Lots of threads about great books but I also want to hear what wasn't so great. My biggest fiction disappointments over the last 5 years were with David and Leigh Eddings' books of the Elder Gods. I loved Eddings' earlier books but these were just appalling!
In the first and the second books the editors needed a bomb under them!! There were whole tracts of text that were repeated almost verbatim in two sections of the books. I didn't buy any more.