So here are mine:
Watermelon by Marian Keyes - I used to have some respect for her. She writes chick lit, but of the good variety. But man, this was awful. So, so silly. I think it was her first book. No shit.
Dragonfly in Amber by Diana Gabaldon - the second one in the series. I blame this book for having read only 16 books this year. It was soooooo long and dragged so much that it took me 3 months to finish. Why I didn't stop reading it is beyond me.
The Two Lives of Miss Charlotte Merryweather by Alexandra Potter - more predictable chick lit.
The problem with buying books is that you feel obliged to read them since you spent the money