His Majesty's Dragon by Naomi Novik -- I bought it and thought the font was too tiny to read and put it aside. I haven't opened it since I redownloaded it after Sony switched to epub. It even went free for a while and I felt bad about paying for it and not reading it.
Another one (bought at the same time) is
World Without End by Ken Follett. I really liked The Pillars of the Earth -- read as a paper book -- but haven't been able to get past the first few pages even after several attempts. I keep trying though since the reviews assure me that I will love it!
