Top Ten Books to Read if You Like Tamora Pierce
1 - Burning Sky by Sherry Thomas
This one has a girl disguising herself as a boy for school (a la Alanna) as well as crazy awesome magic (a la Tris)
2 - The Hero and the Crown by Robin McKinley
3 - Harry Potter Series by J.K. Rowling
4 - Daughter of Smoke and Bone by Laini Taylor
This deals with non-human creatures and humans (and not-so-humans) getting mixed up in it. So, sort of like the Immortals series.
5 - The Queen's Theif by Megan Whalen-Turner
6 - Sabriel by Garth Nix
Strong female protagonist who undergoes a journey to the underworld. I got a little bit of an Immortals feel to this one, but with the underworld instead of the Realms of the Gods as well as a Trickster's Choice feel.
7 - Crown Duel / Court Duel by Sherwood Smith
It has the same Tortall feel that makes for an awesome setting of a fantasy book
8 - The Enchanted Forest Chronicles by Patricia Wrede
A bit of a Daine feel to these. Minus the creepy relationship with Numair.
9 - Unicorn Chronicles by Bruce Coville
His magical world is very Tamora Pierce-esq.
10 - Take a Theif by Mercedes Lackey
This one has Briar written all over it. I actually think that's the main reason why I loved this book so much, Skif is so much like Briar.