Best Middle-Grade Sci-Fi Space Opera

1.
Mech - Heart & Soul (The Mech Trilogy, #1)
Mech - Heart & Soul (The Mech Trilogy, #1) 4.45 avg rating — 40 ratings
2.
Ender’s Game (Ender's Saga, #1)
Ender’s Game (Ender's Saga, #1) 4.31 avg rating — 1,449,892 ratings
3.
The Kaleidoscope: The Gift of Madness
The Kaleidoscope: The Gift of Madness 3.94 avg rating — 72 ratings
4.
In the Window Room (The Histories of Earth, #1)
In the Window Room (The Histories of Earth, #1) 3.67 avg rating — 174 ratings
5.
Maia and the Xifarian Conspiracy (The Lightbound Saga, #1)
Maia and the Xifarian Conspiracy (The Lightbound Saga, #1)
by: S.G. Basu
3.98 avg rating — 80 ratings
5.
The Invasion (Animorphs, #1)
The Invasion (Animorphs, #1) 3.90 avg rating — 19,230 ratings
7.
Barbary
Barbary 3.64 avg rating — 259 ratings
8.
A Prince of Earth (The Histories of Earth, #2)
A Prince of Earth (The Histories of Earth, #2) 4.17 avg rating — 41 ratings
8.
All the Worlds of Men (The Histories of Earth, #3)
All the Worlds of Men (The Histories of Earth, #3) 3.81 avg rating — 16 ratings
10.
Star Wars: Jedi Academy (Jedi Academy, #1)
Star Wars: Jedi Academy (Jedi Academy, #1) 4.20 avg rating — 11,512 ratings
10.
Star Wars: Jedi Academy 2 - Return of the Padawan (Jedi Academy, #2)
Star Wars: Jedi Academy 2 - Return of the Padawan (Jedi Academy, #2) 4.26 avg rating — 5,458 ratings
12.
Primes
Primes 4.44 avg rating — 9 ratings
13.
The Acolytes of Crane (Theodore Crane, #1)
The Acolytes of Crane (Theodore Crane, #1)
by: J.D. Tew
3.93 avg rating — 41 ratings
14.
The Challengers (Galaxy Games #1)
The Challengers (Galaxy Games #1) 4.06 avg rating — 34 ratings
15.
Ant and Cleo Book 1 (Ant and Cleo #1)
Ant and Cleo Book 1 (Ant and Cleo #1) 3.61 avg rating — 126 ratings
15.
Mars Evacuees (Mars Evacuees, #1)
Mars Evacuees (Mars Evacuees, #1) 3.99 avg rating — 701 ratings
15.
Red's Planet (Red's Planet #1)
Red's Planet (Red's Planet #1) 3.83 avg rating — 897 ratings
15.
MiNRS
MiNRS 3.95 avg rating — 1,267 ratings
15.
Archer and Zowie
Archer and Zowie 4.54 avg rating — 37 ratings
20.
runaway alien
runaway alien 4.25 avg rating — 4 ratings
20.
Sister Ships and Alastair (Ant and Cleo #2)
Sister Ships and Alastair (Ant and Cleo #2) 3.88 avg rating — 69 ratings
20.
Zita the Spacegirl (Zita the Spacegirl, #1)
Zita the Spacegirl (Zita the Spacegirl, #1)
by: Ben Hatke
4.10 avg rating — 18,856 ratings
20.
Eaten Alive (Star Wars: Galaxy of Fear, #1)
Eaten Alive (Star Wars: Galaxy of Fear, #1) 3.71 avg rating — 735 ratings
24.
The Secret Signal (Hal Junior #1)
The Secret Signal (Hal Junior #1) 4.20 avg rating — 85 ratings
24.
There Ain't Gonna Be No World War Three (Ant and Cleo #3)
There Ain't Gonna Be No World War Three (Ant and Cleo #3) 3.60 avg rating — 62 ratings
24.
Legends of Zita the Spacegirl (Zita the Spacegirl, #2)
Legends of Zita the Spacegirl (Zita the Spacegirl, #2)
by: Ben Hatke
4.25 avg rating — 10,442 ratings
24.
Marooned! (Mars Year One, #1)
Marooned! (Mars Year One, #1) 2.91 avg rating — 54 ratings
24.
I Spent My Summer Vacation Kidnapped Into Space
I Spent My Summer Vacation Kidnapped Into Space 4.18 avg rating — 93 ratings
29.
House In Space - Middle Grade Science Fiction
House In Space - Middle Grade Science Fiction 0.00 avg rating — 0 ratings
29.
Worlds Unending (The Histories of Earth, #4)
Worlds Unending (The Histories of Earth, #4) 4.69 avg rating — 13 ratings
29.
The Return of Zita the Spacegirl (Zita the Spacegirl, #3)
The Return of Zita the Spacegirl (Zita the Spacegirl, #3)
by: Ben Hatke
4.33 avg rating — 7,489 ratings
32.
Future Robot
Future Robot 4.62 avg rating — 8 ratings
32.
The Moon Platoon (Space Runners, #1)
The Moon Platoon (Space Runners, #1) 3.86 avg rating — 381 ratings
34.
Friends and Foes (Red's Planet #2)
Friends and Foes (Red's Planet #2) 3.92 avg rating — 275 ratings
35.
Acquisition (Lifesphere Inc, #1)
Acquisition (Lifesphere Inc, #1) 4.23 avg rating — 47 ratings
36.
Exterium
Exterium 3.29 avg rating — 7 ratings
37.
George's Secret Key to the Universe (George, #1)
George's Secret Key to the Universe (George, #1) 4.04 avg rating — 8,885 ratings
38.
George's Cosmic Treasure Hunt (George, #2)
George's Cosmic Treasure Hunt (George, #2) 4.21 avg rating — 3,037 ratings
39.
George and the Big Bang (George, #3)
George and the Big Bang (George, #3) 4.23 avg rating — 2,069 ratings
40.
George and the Unbreakable Code (George, #4)
George and the Unbreakable Code (George, #4) 4.29 avg rating — 854 ratings
41.
My Teacher Is an Alien (My Teacher Is an Alien, #1)
My Teacher Is an Alien (My Teacher Is an Alien, #1) 3.80 avg rating — 8,920 ratings
42.
My Teacher Fried My Brains (My Teacher Is an Alien, #2)
My Teacher Fried My Brains (My Teacher Is an Alien, #2) 3.81 avg rating — 2,363 ratings
43.
My Teacher Flunked the Planet (My Teacher Is an Alien, #4)
My Teacher Flunked the Planet (My Teacher Is an Alien, #4) 3.90 avg rating — 2,381 ratings
44.
My Teacher Glows in the Dark (My Teacher Is an Alien, #3)
My Teacher Glows in the Dark (My Teacher Is an Alien, #3) 3.82 avg rating — 3,169 ratings
45.
Is Your Teacher an Alien? (My Teacher, #6)
Is Your Teacher an Alien? (My Teacher, #6) 3.83 avg rating — 77 ratings
46.
Alpha Mission: A Beacon Flight Adventure (Beacon Flight Adventures Book 1)
Alpha Mission: A Beacon Flight Adventure (Beacon Flight Adventures Book 1)
by: A.R. Coy
it was amazing 5.00 avg rating — 1 rating
47.
Assault from Space
Assault from Space 0.00 avg rating — 0 ratings
48.
Message To Badabu (The Badabu Series)
Message To Badabu (The Badabu Series) it was amazing 5.00 avg rating — 1 rating
49.
Caren (The Gypsy Pearl #1)
Caren (The Gypsy Pearl #1) 4.32 avg rating — 91 ratings
50.
The Far Horizon
The Far Horizon 4.06 avg rating — 32 ratings
51.
Space Rats
Space Rats 4.22 avg rating — 27 ratings
52.
Glory Alley and the Star Riders
Glory Alley and the Star Riders 3.96 avg rating — 48 ratings
53.
The Missing Case (Hal Junior #2)
The Missing Case (Hal Junior #2) 4.38 avg rating — 13 ratings
54.
The Gyris Mission (Hal Junior #3)
The Gyris Mission (Hal Junior #3) 4.86 avg rating — 7 ratings
55.
Seventh Grade (Alien!) Hero
Seventh Grade (Alien!) Hero 4.33 avg rating — 6 ratings
56.
The Incredible Space Raiders from Space!
The Incredible Space Raiders from Space! 3.88 avg rating — 225 ratings
57.
Alien Mission (Lady Jenniviere's Quill, #3)
Alien Mission (Lady Jenniviere's Quill, #3) 4.61 avg rating — 18 ratings
58.
This World or the Next (The Perilous Journeys of Wilona Bumbridge, #1)
This World or the Next (The Perilous Journeys of Wilona Bumbridge, #1) 4.25 avg rating — 20 ratings
59.
This Darker Now (The Perilous Journeys of Wilona Bumbridge, #2)
This Darker Now (The Perilous Journeys of Wilona Bumbridge, #2) 4.75 avg rating — 4 ratings
60.
Space Rats on Monster Planet
Space Rats on Monster Planet 0.00 avg rating — 0 ratings