Books About Alien Planets

The Best Alien Planets Books for Kids

By the Bookroo Editors

Looking for excellent children's books about alien planets? This collection brings together Bookroo's highest-rated and most useful picks in one place.

Start with our editorial favorites, then browse recommendations organized by reading stage to find the right book for your reader.

The Shortlist

Our 8 Favorite Books About Alien Planets

Commander Toad and the Intergalactic Spy
Sale price
$574
Chapter Book · Ages 4–8 · 1986

Commander Toad and the Intergalactic Spy

By Jane Yolen · Commander Toad series

A space mission to find a master spy leads to unexpected disguises and challenges.

64 pages· 1,837 words· Est. 31 min read
4.1 Goodreads · 161 ratings
$5.99Save 4%
Paperback
Summary: Commander Toad embarks on a perilous mission aboard the Star Warts to an intergalactic spy convention. His goal: locate the elusive Agent 007½, a master of disguise and his cousin, Tip Toad. With spies everywhere, recognizing Tip without his disguise is crucial. Can Commander Toad succeed before it's too late? Dive into this hilarious space adventure filled with unexpected twists and clever disguises. Fans of quirky humor and thrilling escapades will find themselves toad-ally entertained!
Prisoners of the Poison Sea
Graphic Nov.
Sale price
$2342
Chapter Book · Ages 8–12 · 2019

Prisoners of the Poison Sea

By Michael Dahl, Shen Fei (Illustrator) · Escape from Planet Alcatraz series

Locked in cages above a boiling sea of poison, two prisoners plot one more escape.

40 pages· 1,183 words· Est. 14 min read
2.8 Goodreads · 4 ratings
$24.65Save 5%
Hardcover
Summary: After a failed breakout, Zak Nine and his Quom friend Erro are locked in separate cages hanging on chains over a boiling sea of poison, in the most escape-proof part of Planet Alcatraz. Even if they break free, they still have to cross the deadly water. Zak needs all his wits to save himself and his friend.
Diamonds of Doom
Graphic Nov.
Sale price
$2342
Chapter Book · Ages 8–12 · 2020

Diamonds of Doom

By Michael Dahl, Patricio Clarey (Illustrator) · Escape from Planet Alcatraz series

Two escaped prisoners follow a stranger into a cave, straight into a trap.

40 pages· 1,097 words· Est. 13 min read
4.5 Goodreads · 2 ratings
$24.65Save 5%
Hardcover
Summary: Traveling by night, Zak Nine and Erro follow a shadowy figure into a cave on Planet Alcatraz. Inside is a maze of priceless gems and a band of escaped criminals, one of whom may be a traitor. When prison guards arrive firing laser blasters, the boys must find their way out of the dark before they are trapped for good.
Flaming Fields of Death
Graphic Nov.
Sale price
$2342
Chapter Book · Ages 8–12 · 2019

Flaming Fields of Death

By Michael Dahl, Shen Fei (Illustrator) · Escape from Planet Alcatraz series

Two runaway prisoners must cross a swamp of fire-spitting snakes to reach a lost ship.

40 pages· 1,101 words· Est. 13 min read
3.0 Goodreads · 3 ratings
$24.65Save 5%
Hardcover
Summary: Zak Nine and his alien friend Erro are on the run from the guards of Planet Alcatraz, a prison planet. Another escapee tells them of an abandoned spaceship that might fly them to freedom, but to reach it they must cross the Igneous Quag, a swamp full of flame-spitting snakes and hidden geysers of fire, with a cyborg tank on their trail.
Stranded in Space
Sale price
$1387
Chapter Book · Ages 9–11 · 2019

Stranded in Space

By Rigby · Rigby PM Generations series

A young girl must survive on a deserted alien planet after her spaceship is damaged and she is forced to evacuate

56 pages· 5,902 words· Est. 50 min read
$14.60Save 5%
Paperback
Escape from Balloonia
Graphic Nov.
Sale price
$1248
Picture Book · Ages 6–9 · 2021

Escape from Balloonia

By Dan & Jason, Dan Abdo, Jason Patterson · Book #2 in the Blue, Barry & Pancakes series

Trapped on Balloonia, friends must outsmart Balloon Kong to escape.

128 pages· 1,144 words· Est. 12 min read-aloud
3.9 Goodreads · 175 ratings
$12.99Save 4%
Hardcover
Summary: Blue, Barry, and Pancakes embark on a whimsical journey to Balloonia, a planet of living balloons. What starts as a playful exploration turns perilous when they're captured by the Balloonians. To return home, they must confront the formidable Balloon Kong. Can their friendship and ingenuity save them from this inflatable menace? Join the trio as they navigate a world where balloons come to life, testing the limits of their courage and camaraderie.
Operation Twin Trouble
Sale price
$574
Picture Book · Ages 5–9 · 2015

Operation Twin Trouble

By Ray O’Ryan, Jason Kraft (Illustrator) · Book #12 in the Galaxy Zack series

Zack must mend his sisters' cosmic feud before it spirals out of control.

128 pages· 4,629 words· Est. 36 min read-aloud
4.1 Goodreads · 128 ratings
$5.99Save 4%
Paperback
Summary: Zack's twin sisters, Cathy and Charlotte, are inseparable until a cosmic argument on another planet threatens their bond. Caught in the middle, Zack faces the challenge of restoring peace before their sisterly connection is lost to intergalactic chaos. Can he navigate this tricky situation and reunite them, or will their friendship be torn apart by the stars? Dive into this Galaxy Zack adventure filled with sibling drama and space intrigue, perfect for young readers.
Face Off
Sale price
$759
Chapter Book · Ages 8–12 · 2013

Face Off

By Greg Farshtey, Scholastic (Illustrator) · LEGO Hero Factory series

Discover the secrets of epic battles between heroes and villains in the LEGO Hero Factory universe.

112 pages· 10,261 words· Est. 1.5 hour read
4.1 Goodreads · 15 ratings
$7.99Save 5%
Paperback
Summary: Dive into the LEGO Hero Factory Guide, where Mr. Makuro's creations come alive. Explore detailed bios, thrilling backstories, and secret missions. Uncover the hidden stats that could change the outcome of epic hero-villain face-offs. Will peace and justice prevail in the galaxy, or will chaos reign? This guide is your key to unlocking the mysteries and adventures of the Hero Factory world.
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