As there is a book recommendations thread, I figured there ought to be a warning thread as well (Yin and Yang and all that). Post here the overrated or just plain terrible books you've read in the past!
Personally, I'd like to warn against Julius Caesar by Shakespeare. My least favorite shakespeare ever. It's drawn out (though the actual story is shrunken down from about 4 years to 3 days) , boring, and overwritten (even for Shakespeare)