I'm trying to put together a list of recommended reading of Science Fiction only (not fantasy) for children and another list for YA. I'm thinking the cut off here is about 13 years old. With Science Fiction it's harder to make the cut off, because there are the classics, of course, that we may have read at 11 and 12 that were for adults.
Anyway, I've made two lists. I haven't read everything in the lists so if you see something I've included and it's in Children's when it should be YA, or it's really fantasy, or you wouldn't recommend it to your dog for breakfast, then can you let me know? Also if I have missed a really great work that you would recommend, let me know also?
Also I've gone with the first book in a series, only.
CHILDREN'S:
Grimsdon - Abela, Deborah
The Monster Garden – Alcock, Vivien
Anna to the Infinite Power – Ames, Mildred
Zack Proton – Anderson, Brian
Attack of the Fluffy Bunnies – Beaty, Andrea
Spider Lies – Banyard, Jen
Spacer and Rat – Bechard, Margaret
Star Hatchling – Bechard, Margaret
The Mystery Machine – Brennan, Herbie
The Rise of Renegade X – Campbell, Chelsea M
A Cage of Butterflies – Caswell, Brian
Godzilla at World's End – Cerasini, Marc A
The White Mountains – Christopher, John
Aliens on Vacation – Barrett Smith, Clete
I Left my Sneakers in Dimension X – Coville, Bruce
Space Brat 2: Blork's Evil Twin – Coville, Bruce
The Search for WondLa – De Terlizzi, Tony
Alien Game – Dexter, Catherine
My Stepfather Shrank! - Dillion, Barbara
The City of Ember – DuPrau, Jeanne
Circus Galacticus – Fagan, Deva
The Ear, The Eye, and the Arm – Farmer, Nancy
The Tar-Aiym Krang – Foster, Alan Dean
Singing the Dogstar Blues – Goodman, Alison
Hal Junior – Haynes, Simon
Among the Hidden – Haddix, Margaret Peterson
Found – Haddix, Margaret Peterson
Running Out of Time – Haddix, Margaret Peterson
Have Space Suit, Will Travel – Heinlein, Robert
Escape from Earth – Hess, Debra
Winds of Mars – Hoover, HW
Maphead: The Return – Howarth, Lesley
The Iron Man – Hughes, Ted
Sleepers, Wake – Jacobs, Paul Samuel
Geeks, Girls, and Secret Identities – Jung, Mike
Taronga – Kelleher, Victor
Alien Secrets – Klause, Annette Curtis
A Wrinkle in Time – L'Engle, Madeleine
Children of the Dust – Lawrence, Louise
Dancing with an Alien – Logue, Mary
The Giver – Lowery, Lois
Barbary – McIntyre, Vonda
Eye of the Storm – Messner, Kate
The Great Interactive Dream Machine – Peck, Richard
Adventures of a Cat-Whiskered Girl – Pinkwater, Daniel
Ned Feldman, Space Pirate – Pinkwater, Daniel Manus
Alan Mendelsohn, The Boy From Mars – Pinkwater, Daniel Manus
Tria and the Great Star Rescue – Rector, Rebecca Kraft
Larklight – Reeve, Phillip
The True Meaning of Smekday – Rex, Adam
Galex-Arena – Rubenstein, Gillian
Space Demons – Rubinstein, Gillian
Stinker from Space – Service, Pamela
Downsiders – Shusterman, Neal
The Dark Side of Nowhere – Shusterman, Neal
The Hunchback Assignments – Slade, Arthur
The Night the Heads Came – Sleater, William
When You Reach Me – Stead, Rebecca
The Boy at the End of the World – van Eekhout, Greg
On the Blue Comet – Wells, Rosemary
The Seer – Wisler, G Clifton
Alien Invasion and Other Inconveniences – Yansky, Brian
YA:
Hitchhikers Guide to the Galaxy – Adams, Douglas
Things We Didn't See Coming – Amsterdam, Steve
Feed – Anderson, MT
Foundation – Asimov, Isaac
Genesis – Beckett, Bernard
The Gardener – Bodeen, SA
Dandelion Wine – Bradbury, Ray
Fahrenheit 451 – Bradbury, Ray
Something Wicked This Way Comes – Bradbury, Ray
Parable of the Talents - Butler, Octavia
Ender's Game – Card, Orson Scott
Hunger Games – Collins, Suzanne
The Death Cure – Dashner, James
Burn Bright – de Pierres, Marianne
Do Andriods Dream of Electric Sheep – Dick, PK
Eva – Dickinson, Peter
Little Brother – Doctorow, Cory
A Boy and his Dog – Ellison, Harlan
Journey Between Worlds – Engdahl, Sylvia
Enchantress from the Stars – Engdahl, Sylvia
House of the Scorpion – Farmer, Nancy
The Organ Grinder – Fitzhugh, Bill
Black Hole Sun – Gill, David Macinnis
Waiting for the End of the World – Harding, Lee
The Stainless Steel Rat – Harrison, Harry
Hal Spacejock – Haynes, Simon
Citizen of the Galaxy – Heinlein, Robert
The Red Planet – Heinlein, Robert
The Star Beast – Heinlein, Robert
Starman Jones – Heinlein, Robert
Tunnel in the Sky – Heinlein, Robert
The Rolling Stones – Heinlein, Robert
Dune – Herbert, Frank
Brave New World – Huxley, Aldous
Insignia – Kincaid, SJ
Beggars in Spain – Kress, Nancy
Steal Across the Sky – Kress, Nancy
A Ring of Endless Light – L'Engle, Madeleine
Girl in Landscape – Letham, Jonathan
The Ship Who Sang – McCaffrey, Anne
Black Glass – Mundell, Meg
The Knife of Never Letting Go – Ness, Patrick
Ringworld – Niven, Larry
A Confusion of Princes – Nix, Garth
Moon of Three Rings – Norton, Andre
The Stars are Ours – Norton, Andre
Birthmarked – O'Brien, Caragh M
Z for Zachariah – O'Brien, Robert
1984 – Orwell, George
Emergence – Palmer, David
Rite of Passage – Panshin, Alexei
The Adoration of Jenna Fox – Pearson, Mary E
Life As We Knew It – Pfeffer, Susan Beth
Starters – Price, Lissa
Mortal Engines – Reeve, Philip
Across the Universe – Revis, Beth
How I Live Now – Rosoff, Meg
Divergent – Roth, Veronica
Tankborn - Sandler, Karen
Wake – Sawyer, Robert J
Crossover – Shepherd, Joel
Unwind – Shusterman, Neal
Interstellar Pig – Sleator, William
Inside Out – Snyder, Maria V
Snowcrash – Stephenson, Neal
The Sea and the Summer – Turner, George
An Audience for Einstein – Wakely, Mark
Uglies – Westerfeld, Scott
The Chrysalids – Wyndham, John
Cat's Cradle – Vonnegut, Kurt
Welcome to the Monkey House – Vonnegut, Kurt
(this list magically grows...)