Teen Book Match

Here are some other suggestions that I hope you will like :

Sabriel by Garth Nix.
Sabriel, daughter of the necromancer Abhorsen, must journey into the
mysterious and magical Old Kingdom to rescue her father from the Land of the Dead. The first in a trilogy.

The Amulet of Samarkand by Jonathan Stroud.
Nathaniel, an apprentice to an ineffective magician, takes matters in
his own hand and summons up a djinni to help him get revenge on the evil Simon Lovelace. This is the first book in the Bartimaeus Trilogy.

Since you enjoyed Ender's Game, you might want to try:

Damia's Children by Anne McCaffrey.
They inherited their mother's legendary powers of telepathy. But Damia's children will need more to face the enemy's children--an alien race more insect than human.

The House of the Scorpion by Nancy Farmer.
In a future where humans despise clones, Matt enjoys special status as the young clone of El Patron, the 142-year-old leader of a corrupt drug empire nestled between Mexico and the United States.

Just in case you
are not already familiar with Chris Crutcher's other titles, here are just a
few:

Ironman.
While training for a triathlon, seventeen-year-old Bo attends
an anger management group at school which leads him to examine his
relationship with his father.

Stotan!
A high school coach invites members of his swimming team to a
memorable week of rigorous training that tests their moral fiber as well as their physical stamina.

Thanks for using Book Match, since you like The Warriors and fantasy
stories, here are some titles you might enjoy:

Lionboy by Zizou Corder.
Mysteriously missing parents, a boy who speaks Cat, an extraordinary
floating circus, and a handsome hoodlum villain...get ready for one of the most spectacular adventure stories around!

There are several in the Joe Grey series, in case you haven't read them all. Here are a few other suggestions:

The Cat Who Could Read Backwards by Lilian Jackson Braun.
Reporter Jim Qwilleran is so anxious to get back to work that he accepts a job covering the art world for the Daily Fluxion. When various people turn up dead, only Qwilleran and his "partner," Koko, the Siamese cat, can find the answers. There are about 20 books in this series now-so if you like this first one, there are many others to keep reading!

Since you enjoyed Just Listen by Sarah Dessen, you may enjoy some of her other books such as How to Deal, That Summer, and The Truth About
Forever. You might also enjoy the following:

Hope Was Here by Joan Bauer. (and anything by Joan Bauer)
When sixteen-year-old Hope and the aunt who has raised her move from
Brooklyn to Mulhoney, Wisconsin, to work as waitress and cook in the
Welcome Stairways diner, they become involved with the diner owner's
political campaign to oust the town's corrupt mayor.

Since you enjoyed The Prophet of Yonwood by Jeanne DuPrau, I am sending you some titles that I hope you will like just as much.

Countdown to the Year 1000 / by K.H. McMullan.
Alarmed by a prophecy that the world will end with the arrival of the
year 1000, the students of Dragon Slayers' Academy get some advice from Zack, a boy who has traveled back from 1999.

The Preacher's Boy : a novel / by Terry Pringle.
Relates the experiences of a young man growing up in a small Texas town in the shadow of his strict preacher father.

Elsewhere is so original,I had to really think about what books might be like it. Here are a few
suggestions:

Thief in the House of Memory by Tim Wynne-Jones.
The death of an apparent stranger in the Steeple family's old home
triggers troubling questions for sixteen-year-old Declan as he tries to make sense of his fragmented dreams, random memories, and unexplained coincidences, hoping to learn the truth about the mother who suddenly left when he was ten.

Here are some other books that I hope you will like. Like
Sandry's Book, all of these are stories have magic and friendship in
them.
If you haven't read the three books by Tamora Pierce that come after
Sandry's Book, I'd definitely recommend the rest of the Circle of Magic quartet:
 

I've included three titles below that I hope you might enjoy.

The Secret of Platform 13 by Eva Ibbotson.
Odge Gribble, a young hag, accompanies an old wizard, a gentle fey, and a giant ogre on their mission through a magical tunnel from their Island to London to rescue their King and Queen's son who had been stolen as an infant.

A Wrinkle in Time by Madeline L'Engle.
Meg Murry and her friends become involved with unearthly strangers and a search for Meg's father, who has disappeared while engaged in secret work for the government.