In Pittacus Lore’s The Rise of Nine, third in the New York Times bestselling I Am Number Four series, the stakes are higher than ever as John, Six, and Seven try desperately to find the rest of the Garde before it’s too late.
The Mogadorians who destroyed the planet Lorien continue to hunt down the Garde, the small group of Loric survivors who have taken refuge on Earth. The Garde must come together. They are Lorien and Earth’s only hope.
During the dangerous mission at the Mogadorian base in West Virginia, John found and rescued Nine. But even with their combined powers, special abilities known as Legacies, the pair barely escaped with their lives—and they lost Sam in the process.
In order to save our world and their own, John and Nine must join forces with Six and Seven who have been battling the Mogadorians in Spain, and who are now trying to locate Number Eight in India.
Power in numbers will save us all.
Until the day I met John Smith, Number Four, I'd been on the run alone, hiding and fighting to stay alive.
Together, we are much more powerful. But it could only last so long before we had to separate to find the others. . . .
I went to Spain to find Seven, and I found even more, including a tenth member of the Garde who escaped from Lorien alive. Ella is younger than the rest of us, but just as brave. Now we're looking for the others—including John.
But so are they.
They caught Number One in Malaysia.
Number Two in England.
And Number Three in Kenya.
They caught me in New York — but I escaped.
I am Number Six.
They want to finish what they started.
But they'll have to fight us first.
Meanwhile, John (Four) and Nine, along with Bernie Kosar, Four's shape-shifting Chimæra, start off in an abandoned house while John is recovering from running into the blue force shield at the Mog cave. While they are there John feels bad about leaving Sam inside the Mog cave and thinks about going back for him but Nine won't let him. John has nightmares about Setrákus Ra, leader of the Mogadorians, who has Sam and is torturing him. He asks John to fight him and then he will free Sam. Later both John and Nine open their Chests and try to learn about the contents. They manage to find a way to communicate with the rest of the Garde using the Macrocosm. But while they are trying to transmit a message to the Garde, John hears the same girl he heard earlier in the Macrocosm Earth screaming to Six. Because of this, they do not notice an ambush and are captured by the FBI, who are now working with the Mogs, and are being taken somewhere.
They are both chained up inside the truck but easily free themselves and make the truck tumble over on its sides. While Nine is outside "taking care of" the police that was following them. Four stays inside the truck and he asks one of the dying agents, Agent Walker, where Sam and Sarah are being held and is told that they are being held out west. While John is looking for a healing stone in his Chest, some police are at the back of the truck by the open door. They tell him to put his hands up or they'll shoot and when they do the bracelet he was wearing expands and turns into a force field. He then hears many gunshots outside and goes to check on Nine, but when he goes back inside the truck Agent Walker and Agent Purdy are gone.
The pair take a freight train to Chicago and argue about what to do next. They eventually decide to go to Nine's safe house, although Four is angered by how little Nine seems to care about Sam and Sarah. Nine reveals that his safe house is in the top floor of the John Hancock Center, including training rooms, weapon cabinets and city-wide surveillance systems. Nine shows off how experienced he is with all the rooms and, when the talk returns to Sam and the tablet the two found, he finds out that he has a piece of equipment that fits the tablet. When they use it they see a map of the Earth and several pulsing blue dots; two in Chicago, one in Jamaica and four in India. They realize that the tablet shows the locations of the other Garde and, seeing that there are seven dots instead of six, they remember the dream John had that was of a second ship that made it to Earth, with a man, two others, fifteen Chimærae, and a baby in it, which turns out to be the tenth Garde member.
They then see two green dots, one in New Mexico and the other in Egypt, and realize that these are their ships. As they watch the four dots in India suddenly reappear, with three off the coast of Somalia and one in New Mexico. The pair once again disagree about what to do next (with John wanting to go to new Mexico to rescue the stranded Garde member and Nine wanting to go to Sam's house in Paradise, Ohio, to see what else they can find) and it becomes a fight. The fight goes to the roof where, after a long battle, Nine holds John over the edge and demands that he stop claiming to be Pittacus Lore (which he had told Nine during one of their arguments) and that they go to Paradise. Nine lets John back onto the roof and storms off, threatening to drop him next time.
Later in the night, John has a vision where he and Nine are told to go to New Mexico. After finding out that Nine had the same vision they travel together towards New Mexico. On the way to New Mexico, Nine defends a pair of unarmed hitchhikers from some truckers that say the hitchhikers owed them money, which John ends up giving them. While driving in the desert of New Mexico, John hears a voice in his head and learns that it is Ella they meet up by the entrance to the underground base, but before they can go in they all (John, Nine, Eight, Seven, Ella and BK) have to fight off some government soldiers. They eventually reunite after defeating the FBI who were attacking John and Nine and enter the base. While they are inside the base they find Sarah, who at first thinks that John is Setrákus Ra trying to trick her again and once she believes that its really him she tells them that Six was there but went to fight Setrákus Ra.
They then come across a badly injured Agent Walker and tell Sarah to watch her and tell her to shoot Walker if she tries to escape. In a large room they see a black statue on the roof, which Nine goes to inspect, they then all see Six there, telling them that Setrákus Ra is dead and that the black mass is Mogadorian poison. Eight teleports to Six and embraces her, but is stabbed just as the painting in the Loric cave showed. The copy of Six then transforms into Setrákus Ra, who removes all of their Legacies. Nine fights Setrákus Ra while Bernie Kosar fights off the Mogadorian soldiers. John and Marina try to carry away Eight so that Marina's healing Legacy can return and save him, but are also attacked by Mogs. After defeating them they carry on trying to pull Eight out of the battle. John protecting Marina and Eight gets hurt and is losing blood very quickly.
While Nine is about to be murdered, Ella, who was hiding behind Sarah while she mowed down Mogadorians, appears from behind her and throws a red glowing object at Setrákus Ra, causing the Garde's Legacies to return, but they are both badly injured immediately after. This allows Marina to save Eight, and while John is trying to get over to Ella and Sarah Marina heals him too, but she can't heal Ella and Sarah. John then holds both Ella and Sarah's hands and wishes that they wouldn't die, and then they heal (showing that he has a new Legacy). While that happens Six is at the top of the ceiling and she starts to break free since she also has her Legacies back. When she finally gets out there is an explosion and alarms go off, she stands by John, Seven and Ella when Eight teleports over by them, and they realize that all the battle sounds are gone and that the whole room is empty.
They all look for Nine from the middle of the room, where he was last and than they finally see him, none of them knowing what happened. The Garde all prepare to break out of the Dulce Base and keep training to kill Setrákus Ra.
As soon as they land at the New Delhi airport they are picked up by the Vishnu Nationalist Eight, rebels who worship Number Eight as they believe him to be the reincarnation of the Hindu's god Vishnu. They plan to take the four to the summit of a mountain in the Himalayas, which is where Eight has made his home. However, before they reach the mountains, they are ambushed by soldiers of the Lord's Resistance Front, an organization of people who want to kill Eight and all of those associated with him. After defeating their attackers and reaching the mountain, Six, Marina and Ella have to face three of Vishnu's avatars, which are used as a way of testing whether they are really members of the Garde. Once Number Eight realizes that they are Loric, he tells them his story; his Cêpan Reynolds was killed by Mogodorians after being betrayed by the love of his life, a human named Lola. During this same attack, Eight's chest was taken by the Mogodorians (Which Marina finds at the bottom of a lake). Eight has been living in the Himalayas since Reynolds' death.
They discover that Eight has the Legacy of Teleportation, which they plan to use to reach New Mexico, where they can easily make their way to Number Four. Eight also has the ability to walk on water and can shapeshift. They travel farther up the mountain to a Loric cave that contains a large stone of Loralite, and acts as a "door" between several other locations that have a Loralite stone. In the cave they see paintings on the walls, which is a timeline of the events that have happened and are going to happen. They see the deaths of Numbers One, Two, and Three, Four's battle in the school, Number Five fending off Mogadorians in a tree, and many others. Eventually they come across a painting of someone impaled by a blade, although the face has been chipped away, but Ella puts the pieces back together and it is revealed this is Number Eight, who destroyed the face to try and avoid the fate. The Mogs then burst into the cave. The Garde manage to defend themselves and hold off the Mogs temporarily, but Crayton is killed by trauma from an explosion. Ella finds a note to her from him. This forces the group to perform a hurried teleportation together from the Himalayas.
Six is teleported to a desert in New Mexico while Eight, Seven, and Ella end up in Somalia. Six is dehydrated due to desert heat but manages to make it to an abandoned town, where she is captured by FBI agents. She is than taken to an underground government base after intense questioning on the way there. She manages to break out of her prison cell and while looking for an exit she comes across Sarah Hart, Four's girlfriend who supposedly turned him in to the FBI in the previous novel. To Six's horror, the false Sarah Hart transforms into Setrákus Ra. She challenges Setrákus Ra to a one-on-one fight before being thrown into a cell with the real Sarah Hart. When she does fight Setrákus Ra he ends up turning her to black rock with his whip and turns himself in to Six. She is then attached to the roof of the arena they were battling in, completely encased in the black rock.
Six is forced to watch as the Garde and their friends fight against the Mogadorians in the giant room. When Setrákus Ra is about to kill Nine, Ella throws a sharp object glowing red at Ra, causing their Legacies to come back. It is unknown if their Legacies powering back up or if seeing her friends fighting back harder than before that gets Six to manage to break free from the black rock. After levitating herself down to the floor of the room, it is revealed that Setrákus has disappeared along with the other Mogadorians. She reunites with the Garde, and Nine immediately hits on her. All of the Garde (excluding Number Five) stand side-by-side and prepare to fight their way out of the Dulce Base. Six declares that the next time they fight Setrákus Ra, he will not get away from them.
The audio version of The Rise of Nine was performed by Neil Kaplan and Marisol Ramirez, returning to read Four's and Marina's narration respectively. Devon Sorvari joins the voice cast, reading Six's Narration. The run time is 10 hours and 8 minutes.
The Rise of Nine has received postive reviews. Teen Reviews wrote "THE RISE OF NINE delivers. Not only are there intense action scenes where every Lorien (if you can keep them straight in your brain) plays an important role, there is also more insight into the background and potential future of their mission." Digital Journal wrote "All of this equals a super fun ride for anyone who wants a quick, mindless read that will have you eager for the next book in the series to hurry up and come out already!" 
- This is the first book in the series to have three narrators.
- As part of the promotion for The Rise of Nine, the official website offered a countdown with a new "snippet", of some description, at each milestone. Material released in order:
- The first five chapters of The Fallen Legacies.
- Chapter seventeen of the Fallen Legacies, introducing Number Two.
- The first five chapters of The Rise of Nine.
- The first entry of Sam's Journal.
- Number Five tracker, placing him in South America.
- A Transmission from Pittacus Lore/
- Marina's painting of her memory of Lorien in her cave.
- Chapter Eleven of The Rise of Nine, introducing Number Eight.
- Eight's Origin.