"When the space station Heimdall is invaded, Hannah and Nik must work together to defeat the enemy"--

"The planet Kerenza is attacked, and Kady and Ezra find themselves on a space fleet fleeing the enemy, while their ship's artificial intelligence system and a deadly plague may be the end of them all"--

Beautifully updated with fresh color, this new edition Astronaut Academy: Zero Gravity is the first volume of the middle-grade graphic novel series from Dave Roman. Hakata Soy’s past won’t stay in the past! This former space hero is doing his best to keep his head down at Astronaut Academy. Things aren’t going so great, though. The most popular girl in school has it in for him. His best friend won’t return his calls. And his new roommate...

After receiving a mysterious coded message, Zen Starling abandons his life of luxury and, with the help of sentient trains, goes in search of android Nova, who plans to reawaken the Railmaker.

Zen Starling, a small-time thief, and Nova, an android girl come from the Network Empire, whose stations are scattered across the galaxy and linked by the K-gates and the sentient trains travel at light speed between them--but the gate through which they just passed was a new one, and they have no way of knowing into what danger it might have led them.

Kady, Ezra, Hanna, Nik reluctantly return to Kerenza with other refugees, while Asha has joined Kerenza's ragtag underground resistance, and when she reconnects with her old flame Rhys, the two find themselves on opposite sides of the conflict.