"A book that disappointed me."
Harry Potter and the Deathly Hallows. I loved the Harry Potter series, though I was more impressed with the two final movies than I was with the last book. The last book was overly and unnecessarily dramatic, it felt long winded and the end didn't really make much sense. At least not to me. So rather disappointing for a series I loved so much.
Vampire Academy didn't impress me much either. I'd had in in paperback for ages, and it sounded awesome. I kept seeing new additions to the series including a spin off series. Though when I read the first book, I just felt...meh...about it. The characters didn't particularly do anything for me, neither did the plot.