New to Galaxy Zack
Begin with Hello, Nebulon! It introduces Zack's move, family, school, and the friendships every later adventure assumes.
Book Series · 18 Books
Galaxy Zack Books
In order from Hello, Nebulon! to Game Over, Nebulon.
Fast, highly illustrated science-fiction adventures about Zack Nelson moving from Earth to Nebulon, making new friends, and exploring a galaxy full of strange planets and inventions.
Reviewed by the Bookroo Editors Updated
Reading order
How to Read the Galaxy Zack Books
Read the eighteen books in numbered order, beginning with Hello, Nebulon! Each adventure resolves clearly, but Zack's adjustment to a new planet, friendships, school life, and knowledge of the galaxy build across the series.
The collected sets repackage books from this same sequence. They do not add missing adventures, so families can choose individual books or a collection without changing the order.
Sources: Simon & Schuster Galaxy Zack series.
For parents
What Parents Should Know
Zack deals with moving far from home, missing Earth, fitting in at a new school, and making friends. Spaceship trouble, strange creatures, villains, spooky holiday plots, and planets in danger add suspense, but the tone stays playful and reassuring.
Short chapters, large type, and illustrations on almost every page make this a friendly bridge into independent chapter-book reading for children who enjoy space and technology.
Where to start
Where Should My Child Start?
Where the story begins
First Book in the Series
Sale price
$674
Book #1 · Picture Book · Ages 5–7 · 2013
Hello, Nebulon!
By Ray O’Ryan, Colin Jack (Illustrator)
A young boy moves to a new planet with his family and navigates a new school and friendships.
128 pages· 4,694 words· Est. 37 min read-aloud
5.0/7 Bookroo
$6.99Save 4%
Paperback
In reading order
Galaxy Zack Series
18 books · Published 2013–2022
#1
Sale price
$674
Hello, Nebulon!
Picture Book · Ages 5–7 · 2013
A young boy moves to a new planet with his family and navigates a new school and friendships.
#2
Sale price
$674
Journey to Juno
Picture Book · Ages 5–9 · 2013
A young boy named Zack Nelson explores the planet Juno with his school's Explorers Club and makes a groundbreaking discovery
#3
Sale price
$674
The Prehistoric Planet
Picture Book · Ages 5–9 · 2013
A lost pterosaur needs help returning home. Can Zack and his team navigate the prehistoric world?
#4
Sale price
$574
Monsters in Space!
Picture Book · Ages 5–7 · 2013
A boy befriends a monster-like alien who is visiting his school on the planet Nebulon
#5
Sale price
$674
Three's a Crowd!
Picture Book · Ages 5–9 · 2013
A boy is excited to show his friend from Earth around his new home on the planet Nebulon
#6
Sale price
$674
A Green Christmas!
Picture Book · Ages 5–9 · 2013
Zack's Christmas plans change with a cosmic storm and mysterious green snow.
#7
Sale price
$674
A Galactic Easter!
Picture Book · Ages 5–9 · 2014
Zack faces a dilemma: win fairly or cheat on the candy planet.
#8
Sale price
$674
Drake Makes a Splash!
Picture Book · Ages 5–7 · 2014
Can Drake conquer his fear of water before their next space adventure?
#9
Sale price
$574
The Annoying Crush
Picture Book · Ages 5–9 · 2014
A robot's crush on Zack spirals into chaos. Can he fix it?
#10
Sale price
$674
Return to Earth!
Picture Book · Ages 5–9 · 2015
A planet-hopping boy's Earth visit turns chaotic when his dog goes missing.
#11
Sale price
$574
A Haunted Halloween
Picture Book · Ages 5–9 · 2015
Zack faces eerie events that challenge his disbelief in ghosts this Halloween.
#12
Sale price
$574
Operation Twin Trouble
Picture Book · Ages 5–9 · 2015
Zack must mend his sisters' cosmic feud before it spirals out of control.
#13
Sale price
$674
Science Fair Disaster!
Picture Book · Ages 5–9 · 2016
Zack's science project malfunctions at the Intergalactic Fair. Can he fix it before chaos ensues?
#14
Sale price
$674
Space Camp
Chapter Book · Ages 5–9 · 2016
Space camp turns chaotic. Can Zack unite his cabin mates before summer is ruined?
#15
Sale price
$674
Ready, Set, Blast Off!
Chapter Book · Ages 5–9 · 2017
A galactic race turns chaotic. Can Zack lead his team to victory amidst turmoil?
#16
Sale price
$674
Cosmic Blackout!
Chapter Book · Ages 5–9 · 2017
Nebulon faces a cosmic blackout. Can Zack adapt without his tech comforts?
#17
Sale price
$674
Snow Place Like Home
Chapter Book · Ages 5–9 · 2018
Zack faces unexpected challenges on a galactic winter vacation. Can he overcome them before heading home?
#18
Sale price
$674
Game Over, Nebulon
Chapter Book · Ages 4–8 · 2022
A game turns real, threatening Zack's world. Can he stop the villain?
Good to know
Common Questions
How many books are in the Galaxy Zack series?
There are 18 books in the Galaxy Zack series. It began with Hello, Nebulon! in 2013, and the newest book, Game Over, Nebulon, was published in 2022.
What order should you read the Galaxy Zack books in?
Start with Hello, Nebulon! and follow the series order — the books above are numbered #1 through #18.
What ages are the Galaxy Zack books best for?
The series is best for ages 4–9, based on the age ranges of the individual books.
Which Galaxy Zack book is the longest?
Space Camp (Book #14) is the longest book in the series at 5,178 words (128 pages).
Which Galaxy Zack book is the shortest?
Drake Makes a Splash! (Book #8) is the shortest at 4,463 words (128 pages).
The people
The Creatives Behind the Books
The people who bring Galaxy Zack to life.
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