Harry Potter and the Sorcerer's Stone
Harry Potter and the Chamber of Secrets
Harry Potter and the Prisoner of Azkaban
Harry Potter and the Goblet of Fire
Harry Potter and the Order of the Phoenix
Harry Potter and the Half-Blood Prince
Harry Potter and the Deathly Hallows
The books always have an ending you don't expect, they are funny, the characters are good, the stories are really well written, and most of the covers look nice too.
P.S. The movies are also good. The last one (Deathly Hallows part two) might actually be better than the corresponding part of the book.
