When a cosmic storm hits, stranding the Nelsons on their new home planet, Nebulon, Zack's hopes of a white Christmas in Vermont are dashed, but Nebulon provides a surprising alternative.

When summer arrives on Nebulon, Zack discovers that his best friend, Drake, is afraid to learn to swim and decides to teach him before they go on a trip to water-covered planet Araxie.

Moving from Earth to the futuristic planet Nebulon in 2120, eight-year-old Zack is nervous about starting school and meeting people.

Zack and his father are invited to join the Nebulon Navigators as they set out to return a lost baby pterosaur to the Prehistoric Planet, where Zack sees animals and plants he had only read about in books.

When Zack and his friends enter the Starcade gaming competition, Zack thinks it is all fun and games--until he realizes that the decisions he makes while playing the game starts to affect his daily life on Nebulon.

Will troublesome cabin mates ruin Zack's summer at space camp on the planet Sylvan?

There's snow place like home in this seventeenth Galaxy Zack adventure! The Nelsons are ready for a galactic winter vacation on a great new planet! And Zack's best friend, Drake, is coming too! From solar-snowboarding, hydro-freeze fishing, supreme snowball fights, and epic ice forts, the boys can't wait to dive into the winter games. But at the resort, Zack realizes there are a bunch of hurdles he wasn't prepared for. Will Zack find a way to beat...

On the planet Nebulon in 2120, Zack joins his school's Explorer's Club and visits Juno, a planet made of crystals, but he is less than thrilled when he is partnered with the class bully.

When his project malfunctions during the Intergalactic Science Fair, will Zack, a boy from Earth living on the planet Nebulon, be able get things under control before disaster erupts?