I re-read a lot of my books, particularly as sometimes I'm not in the mood for something new. Favourites of mine include:
+Harry Potter by JK Rowling
+Sookie Stackhouse series by Charlaine Harris
+Twilight series by Stephenie Meyer
+Most of Sophie Kinsella's books
+Pride and Prejudice by Jane Austen
+A Handmaid's Tale by Margaret Atwood
+The House of Night series by PC and Kristin Cast
+Vampire Diaries series by LJ Smith
When I have read a series of books, I tend to skim-read them the second or third time, cutting to the interesting parts or bits I want to read.