These are books that feature books in the subject or book lovers.

Inkheart by Cornelia Funke
This story centers around a book titled, Inkheart from which characters have accidently been brought to life (BAD characters). Each Chapter features a quote from a book like The Princess Bride by William Golding.
Inkheart Movie Press Release
Inkspell (2nd in trilogy) and Inkdeath (3rd in trilogy) by Cornelia Funke
The Book Thief by Markus Zusak
Dash and Lily's Book of Dares by Rachel Cohn and David Levithan