Author Information
Ray O'Ryan's Latest Book

Newest Release

  • Bibliography:
    18 Books (1 Series)
  • First Book:
    April 2013
  • Latest Book:
    December 2022
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Full Series List in Order

Galaxy Zack

1 - Hello, Nebulon! (Apr-2013)
2 - Journey to Juno (Apr-2013)
3 - The Prehistoric Planet (Jun-2013)
4 - Monsters in Space! (Aug-2013)
5 - Three's a Crowd! (Sep-2013)
6 - A Green Christmas! (Oct-2013)
7 - A Galactic Easter! (Jan-2014)
8 - Drake Makes a Splash! (May-2014)
9 - The Annoying Crush (Dec-2014)
10 - Return to Earth! (Mar-2015)
11 - A Haunted Halloween (Aug-2015)
12 - Operation Twin Trouble (Sep-2015)
13 - Science Fair Disaster! (Apr-2016)
14 - Space Camp (Jun-2016)
15 - Ready, Set, Blast Off! (Apr-2017)
16 - Cosmic Blackout! (Nov-2017)
17 - Snow Place Like Home (Oct-2018)
18 - Game Over, Nebulon (Dec-2022)

Book List in Order: 18 titles



  • 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 friend...



  • oin Zack as he takes a trip to the planet Juno, makes an amazing discovery, and learns the importance of teamwork! In Journey to Juno, Zack joins his school’s Explorer’s Club and visits Juno, a newly discovered planet of crystals. The group is...



  • 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 jou...



  • 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 f...



  • 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 ...



  • 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 look...



  • 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 a...



  • Zack tries to help Drake learn to swim in this chapter book adventure -- but is he in over his head? Zack is surprised when he discovers that his best friend Drake doesn’t know how to swim! With a little patience and some help, Zack has Drake sp...



  • 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 sh...






  • Zack is a planet-hopping pro -- but a return to Earth results in some unexpected puppy trouble in the tenth Galaxy Zack chapter book adventure. Zack is headed back to Earth for the first time since moving to Nebulon. He can’t wait to see his bes...



  • 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 the...



  • Zack has to help his sisters make up after an out-of-this world argument in this twelfth Galaxy Zack chapter book adventure. Zack’s twin sisters are the best of friends. They’re never apart, share everything, and even finish each other’s sen...



  • Zack has his work cut out for him as he prepares for the Intergalactic Science Fair in the thirteenth Galaxy Zack adventure. When the Intergalactic Science Fair returns to Nebulon, the pressure is on for Sprockets Academy’s students to uphold th...



  • Zack and his friends are off to space camp on a new planet in the fourteenth Galaxy Zack adventure. Camp Among the Stars! Summer vacation is finally here and Zack is pumped for space camp! He can’t wait to play galactic games, tell scary stor...



  • 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 acro...



  • 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 hy...



  • 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, su...



  • Zack and his friends travel to a video game planet in this eighteenth Galaxy Zack adventure!Zack and his friends enter the Starcade gaming competition! At first, Zack thinks it’s all fun and games until he realizes that the decisions he makes while...


Frequently Asked Questions (FAQ)

Ray O'Ryan has published 18 books.

Ray O'Ryan does not have a new book coming out soon. The latest book, Game Over, Nebulon, was published in December 2022.

The first book by Ray O'Ryan, Journey to Juno, was published in April 2013.

Yes. Ray O'Ryan has 1 series.