I have been asked by a few people for some good ideas on books for their kids for Christmas. I decided to compile a little list. Some are more for girls but a lot can be enjoyed by both girls and boys. I'll label the more girlie books.
Teens (Probably 13 and up)-
The Thief by Megan Whalen Turner
Eragon by Christopher Paolini
Leviathan by Scott Westerfeld
Uglies by Scott Westerfeld
I'd Tell You I Love You, But Then I'd Have to Kill you by Ally Carter (Girls)
The Heist Society by Ally Carter (Girls)
Starcrossed by Elizabeth Bunce
The Alchemyst by Michael Scott
Matched by Ally Condie (Girls)
My Fair Godmother by Janette Rallison (Girls)
Beastly by Alex Flinn
Airman by Eoin Colfer
The Demon King by Cinda Williams Chima
Tiger's Curse by Colleen Houck (Girls)
Older Child/Preteen (Maybe 8-12)
Fablehaven by Brandon Mull
The Candy Shop War by Brandon Mull
The Lost Hero by Rick Riordin
The Red Pyramid by Rick Riordin
Magyk by Angie Sage
Inkheart by Cornelia Funke
Book of a Thousand Days by Shannon Hale (Girls)
Artemis Fowl by Eoin Colfer
The Ranger's Apprentice by John Flanagan
The Girl Would Could Fly by Victoria Forester
The Frog Princess by E.D. Baker (Girls)
The Wide Awake Princess by E.D. Baker (Girls)
The Evolution of Calpurnia Tate by Jacqueline Kelly (Girls)
Diary of a Wimpy Kid by Jeff Kinney
The 39 Clues Series by Various Authors
Savvy by Ingrid Law
Scumble by Ingrid Law
Ida B. by Katherine Hannigan
11 Birthdays by Wendy Mass (Girls)
Finally by Wendy Mass (Girls)
13 gifts by Wendy Mass (Girls)
Jeremy Fink and the Meaning of Life by Wendy Mass
Hope this is helpful to someone out there!