Book 1

Bokurano: Ours, Vol. 1

by Mohiro Kitoh

Published 31 December 2011
One summer, 15 kids innocently wander into a nearby seaside cave. There they meet a strange man who invites them to play an exciting new video game. Sounds like fun, right? This game, he explains, pits a lone giant robot against a horde of alien invaders. All they have to do is sign a simple little contract. The game stops being fun when the kids find out the true purpose of their deadly pact.

Book 2

Bokurano: Ours, Vol. 2, 2

by Mohiro Kitoh

Published 21 September 2010

Book 3

Bokurano: Ours, Vol. 3

by Mohiro Kitoh

Published 16 February 2010
As the fate of the Earth hangs in the balance, the underage pilots of the giant alien robot Zearth begin to crack under the pressure and the government tries to intervene, with little success.

Book 4

Bokurano: Ours, Vol. 4, 4

by Mohiro Kitoh

Published 9 August 2011
"Having no interest in boys her own age, young Chizu develops a crush on her schoolteacher. After a few tentative secret dates, her relationship with the older man takes an unexpected and violent twist. When Chizu finally takes control of Zearth, she's got two things on her mind: save the planet and exact her revenge on her ex-lover."--Cover flap.

Book 5

Bokurano: Ours, Vol. 5, 5

by Mohiro Kitoh

Published 17 January 2012

Book 6

Bokurano: Ours, Vol. 6, 6

by Mohiro Kitoh

Published 19 June 2012
One summer, fifteen kids innocently wander into a nearby seaside cave. There they meet a strange man who invites them to play an exciting new video game. This game, he explains, pits one lone giant robot against a horde of alien invaders. To play the game, all they have to do is sign a simple contract. The game stops being fun when the kids find out the true purpose of their pact. Now the children know the truth: their opponents are human beings, just like them. Despite going into his battle with mixed feelings, Kirie finds one more chance to surprise his fellow pilots. Komo follows after him to what seems like an easy victory...until the enemy's tentacles threaten to overwhelm her.

Book 7

Bokurano: Ours, Vol. 7, 7

by Mohiro Kitoh

Published 20 November 2012

Book 8

Bokurano: Ours, Vol. 8, 8

by Mohiro Kitoh

Published 16 April 2013
Through battle after battle, the world has known Zearth as an implacable force of destruction. Now, the monster has a human face, as Anko uses her father's broadcast to deliver a message to the world. An outpouring of support carries the children into Kanji's battle, a test of endurance that may only be won by a drastic, irreversible decision.

Book 9

Bokurano: Ours, Vol. 9, 9

by Mohiro Kitoh

Published 17 September 2013
"Zearth's next pilot is Kana Ushiro, the one child supposedly spared from the contract that has driven her friends to fight for the survival of their universe. Fearing for her youngest pilot's chances, Lieutenant Tanaka plans a shocking operation to keep Zearth in the game"--Publisher's web site.

Book 10

Bokurano: Ours, Vol. 10, 10

by Mohiro Kitoh

Published 18 February 2014
Two children remain to fight for Earth's survival, and one of them isn't from this Earth at all. Zearth's next pilot, Yoko Machi, has been possessed by the mind of a refugee from a parallel world. Before she goes into battle, she and her fellow pilot Jun Ushiro face a struggle of a different kind, as they confront the many victims left behind in Zearth's wake.

Book 11

Bokurano: Ours, Vol. 11, 11

by Mohiro Kitoh

Published 16 September 2014
Zearth's battles follow an ironclad rule. If Zearth loses the battle, or if 48 hours pass without victory, Earth will be destroyed, along with humankind and every other living thing on the planet. Zearth's opponents are Earthlings of a parallel world. Victory is achieved by killing the enemy pilot. If Zearth's pilot is killed, Zearth loses the battle. Pilots are contracted in advance. One pilot is selected for each battle. Only the selected pilot commands Zearth. The pilot cannot transfer control. If the pilot dies of natural causes or is killed by a fellow Earthling, another contracted pilot will be chosen to assume command. After the battle's end, the deceased pilot's body is sent home. However, at the pilot's request, the body may be stored within Zearth, or made to simply vanish.