Ray O'Ryan

17 children’s books by the writer

Ray O'Ryan is the author of the Galaxy Zack series and has loved space stories ever since he watched the very first episode of Star Trek. He loves to imagine what traveling across the galaxy might be like and is a bit jealous of Galaxy Zack in this regard. Ray lives in the beautiful Catskill Mountains of upstate New York with his wife and two loveable, zany cats named Stitch and The Way.

Return to Earth!

Ray O'Ryan

Return to Earth!

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 ...

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Drake Makes a Splash!

Ray O'Ryan

Drake Makes a Splash!

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 ...

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Galactic Easter!

Ray O'Ryan

Galactic Easter!

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 ...

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Green Christmas!

Ray O'Ryan

Green Christmas!

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 ...

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Three's a Crowd!

Ray O'Ryan

Three's a Crowd!

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 ...

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Monsters in Space!

Ray O'Ryan

Monsters in Space!

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 ...

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Galaxy Zack: Hello, Nebulon

Ray O'Ryan

Galaxy Zack: Hello, Nebulon

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 ...

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Galaxy Zack: Journey to Juno

Ray O'Ryan

Galaxy Zack: Journey to Juno

Join 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 ...

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