Book 1

Hello, Nebulon!

by Ray O'Ryan

Published 2 April 2013
Get to know Galaxy Zack-and his new home planet!-in this start to an out-of-this-world illustrated chapter book series.

In Hello, Nebulon!, Zack makes the big move from Earth. He is already nervous about starting school and making new friends, but it only gets worse when he dreams that his classmates are slimy aliens with tentacles, pizza comes covered in gross bugs, and he can never communicate with his Earth friends again! Fortunately, when Zack arrives at Sprockets Academy for his first day of school, he meets and befriends Drake Tucker, a Nebulite boy who also loves to explore and learn about the planets. Nebulon isn't as awful as Zack's dream, but there are a lot of differences between Nebulon and Earth, and they make Zack miss his home in Dubbsville, Texas, even more. But things start to look up when he receives a mysterious surprise. What could it possibly be?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 1

Hello, Nebulon!

by Ray O'Ryan

Published 2 April 2013

Book 2

Journey to Juno

by Ray O'Ryan

Published 2 April 2013
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.

Book 3

The Prehistoric Planet

by Ray O'Ryan

Published 11 June 2013
Galaxy Zack blasts back to the past in this outer space chapter book adventure!

A baby pterosaur can’t find his way home, so it’s up to the Nebulon Navigators to return him to the Prehistoric Planet. And when Zack’s dad is invited on the journey, Zack finds a way to go along too! But as they blast off on the super shuttle, they hear a strange noise. Is it the pterosaur, crying for his mama? No, it’s...Zack’s dog, Luna, who has snuck onto the shuttle!

When the shuttle lands, Zack can't believe his eyes: The Prehistoric Planet is full of creatures that he’s only read about in books. Zack and the team of navigators head out in search of the pterosaur’s mother—and end up in the middle of an amazing adventure.

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 4

Monsters in Space!

by Ray O'Ryan

Published 6 August 2013
Zack learns that appearances aren't everything when he has an up-close-and-personal monster encounter in this chapter book adventure.

Zack is shocked when he goes to school one day and finds a monster in his seat! Who/what is this creature? At first Zack is scared, but he soon finds that this monster, Al, is kind and friendly. Zack and Al become fast friends, and Zack goes to Al's planet and meets all kinds of other monsters. Zack realizes that just because Al looks different, it doesn't mean that he's weird or strange.

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 5

Three's a Crowd!

by Ray O'Ryan

Published 17 September 2013
Zack finds out that two best friends are better than one in this chapter book adventure.

Zack is thrilled when he finds out that his best friend on Earth, Bert Jones, is going to visit him on Nebulon. Zack can't wait to show Bert around the new planet, as well as his new school. But when Bert meets Drake, Zack's best friend on Nebulon, some jealousy starts to brew. Drake feels left out when Zack and Bert tell stories from Earth and share inside jokes. And he feels even more left out when the three boys go to an amusement park on the planet Cisnos and Zack and Bert go on all the rides...without Drake. When Zack finally realizes how out-of-place Drake feels, he, Drake, and Bert decide to all have fun together. Because, of course, two best friends are even better than one!

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 6

A Green Christmas!

by Ray O'Ryan

Published 1 October 2013
Zack wants to go back to Earth for a white Christmas—but it turns out a green Christmas is just as cool!

Christmas is just a few days away and Zack Nelson can’t wait to get back to Earth and spend it with his relatives in Vermont. He’s looking forward to sledding and having a white Christmas! But when a cosmic storm hits Nebulon, the Nelsons have to cancel their travel plans and spend Christmas on their new home planet. Zack is distraught....until the storm hits.

What are those green flakes falling from the sky? Could they be...snow? A white Christmas would have been nice, but maybe a green one is even better!

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 7

A Galactic Easter!

by Ray O'Ryan

Published 21 January 2014
Galaxy Zack has some "sweet" competition in this Easter-themed chapter book adventure!

Zack and Drake venture to Gluco, the candy planet, for some Easter fun. Once there, the two friends decide to compete in activities, including an egg toss and a three-legged race. Zack remembers how he used to win all the Easter competitions on Earth, and he is determined to win them on Gluco, too. With the contest so close, Zack begins to wonder if he should cheat to ensure victory. Will Zack have to choose between playing fair or coming out on top?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 8

Drake Makes a Splash!

by Ray O'Ryan

Published 6 May 2014
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.

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. Book #8

Book 9

Annoying Crush

by Ray O'Ryan

Published 16 December 2014
The Super Advanced Robotic Assistant (SARA) develops an annoying crush on Zack in this Galaxy Zack chapter book adventure.

Zack can't wait to test out Sara, the new Super Advanced Robotic Assistant that his dad's been working on. At first she's great and super helpful! Sara helps Mom unpack clothes for her store at lightning speed. She plays catch with Luna. And she turns into a one-bot band for the twins. But when Sara develops a huge crush on Zack, the fun is over! Can Zack figure out a way to fix this mixed-up robot?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 10

Return to Earth!

by Ray O'Ryan

Published 24 March 2015
"Zack is headed back to Earth for the first time since moving to Nebulon. He can't wait to see Bert and show his new friend, the former bully Seth Stevens, all around his old stomping grounds. When Zach's dog Luna escapes and goes missing, sightseeing plans take an unexpected turn. Will Zack find Luna before he has to head home to Nebulon?"--

Book 11

Haunted Halloween

by Ray O'Ryan

Published 28 July 2015
Zack doesn't think ghosts exist-but a haunted Halloween might change his mind in the eleventh Galaxy Zack chapter book adventure.

Zack absolutely, one hundred percent does not believe in ghosts-even when his friend Drake tells him that they are real. But as Halloween nears, weird things start to happen, and Zack begins to think that he might be haunted. Can Drake help Zack solve what goes bump in the night?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 12

Operation Twin Trouble

by Ray O'Ryan

Published 15 September 2015

Book 13

Science Fair Disaster!

by Ray O'Ryan

Published 12 April 2016
When the Intergalactic Science Fair returns to Nebulon, the pressure is on for Sprockets Academy s students to uphold their winning streak. Zack is sure he can win. But when his project malfunctions, will he be able to get things under control before disaster erupts?

Book 14

Space Camp

by Ray O'Ryan

Published 31 May 2016
Summer vacation is finally here and Zack is pumped for space camp! He can t wait to play galactic games, tell scary stories, and go on crazy camping adventures with new friends. But when there s trouble between his cabin mates, it s up to Zack to bring everyone together. Will he be able to find a solution before the entire summer is ruined?

Book 15

Ready, Set, Blast Off!

by Ray O'Ryan

Published 28 March 2017
Zack and his friends zoom across the galaxy for the Interstellar Space Race in this fifteenth Galaxy Zack adventure.

When the Sprockets Academy Zoomers enter the Intergalactic Space Race, Zack and his friends are in for an epic race adventure across the galaxy. It’s time to navigate through an underwater maze, fly around planetary rings, and blast through the stars! But when trouble stirs within the team, Zack must take charge. Can he lead them to victory?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Book 16

Cosmic Blackout!

by Ray O'Ryan

Published 14 November 2017

Book 16

Cosmic Blackout!

by Ray O'Ryan

Published 14 November 2017
In this sixteenth Galaxy Zack adventure, Nebulon falls into a complete cosmic blackout!

Zack loves everything about his new planet, Nebulon. There's Ira, his Indoor Robotic Assistant, who makes him delicious food every day. There's Zack's hyperphone for playing games with friends. Even his desk at school is pretty grape. But Zack wakes up one morning to discover that everything awesome about his new planet is out of order. Nebulon has fallen into a complete cosmic blackout. Without power, how will Zack and his friends ever get through the day?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.


Book 17

Snow Place Like Home

by Ray O'Ryan

Published 9 October 2018
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 out the winter blues before it’s time to snow home?

With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.

Galaxy Zack 4 Books in 1!

by Ray O'Ryan

Published 15 March 2016