Hilo and DJ, with the help of Polly, the magical warrior cat, travel through a mysterious portal and battle bad guys, face disgusting food, an angry mom, and powerful magic to save their friend Gina.

"When a little girl finds an adorable robot in the woods, she presses a button and accidentally activates him for the first time. Now, she finally has a friend. But the big, bad robots are coming to collect the little guy for nefarious purposes, and it's all up to a five-year-old armed only with a wrench and a fierce loyalty to her mechanical friend to save the day!" --

"Still training to be a sidekick, Katie protects the city against mysterious robot attacks--while trying not to feel like an outsider within her own friend group"--

"Clementine Chang moves from Earth to Mars for a new start and is lucky enough to land her dream job with Dr. Marcella Lin, an Artificial Intelligence pioneer. On her first day of work, Clem meets Dr. Lin's assistant, a humanoid AI named Kye. Clem is no stranger to robots--she built herself a cute moth-shaped companion named SENA. Still, there's something about Kye that feels almost too human. When Clem and Kye begin to collaborate, their chemistry...

In a world of villainous cowboys, high-speed chases, and falling pianos, can our iconic trio find their way back to one another and save the Moon Queen before it's too late? And who would want to poison her? With few she can trust in her own royal court, Moon Queen and First Cat will have to journey alone to find the antidote. If only LOZ 4000 were still with them... but our once-heroic toenail clipping robot is on the run, looking for a new purpose...

Tim-21, Telsa and Quon finally escape the Machine Moon and head out on a quest to find the ancient robot who may hold the key to the Harvesters. Meanwhile Andy and his rag-tag team close in on Tim, but their fragile alliance is shattered by Driller's revealtions.

"All the various factions that have been hunting TIM-21 finally converge around the ocean planet Mata, just as the robots launch their galaxy-wide revolution. But nothing can prepare the young android Tim--or the readers--for what happens next. This climactic chapter...brings the Descender saga to a close and sets the stage for the next mind-bending adventure."--Page 4 of cover

"For five books, Razorwark has chased Hilo through the Universe. Now the chase is over... Being a hero isn't easy. But Hilo had no idea it would be this hard. Hilo came to earth because he was running from Razorwark. But he's done running. Razorwark has come to earth. And the time has come for one final face to face showdown. What happens will decide the fate of the robot world. . . and Hilo's future. The sacrifice will be great. But with Izzy's help,...

"The universe is on the brink of war and the young android TIM-21 has somehow found himself at the center of it all. As his allies and enemies gather above the ocean planet, Mata, nothing can prepare TIM for the secrets that lie hidden below the alien seas."--Page 4 of cover.

Hilo and his friends learn more about Hilo's past while they battle robots that were buried underground on Earth a thousand years ago.