I agree, Mister B. Gone has very unique cover art but it is turning out to be a mediocre story. I haven't finished it yet but with only 50ish pages to go I doubt it will surprise me.Generally cover art does not sway me. I certainly appreciate an interesting cover, but I have never found the cover art to be an accurate guide to whether or not I will enjoy a book.
I mostly buy books that have been recommended or by authors I like to read. But, I did just buy Mister B. Gone mainly for the books design. Its made to look very old and beat up, even all the pages look like they are yellowing on the edges. I used to work in the printing industry for many years so that kind of stuff can peek my interest.
I haven't finished it yet so I'll have to let you know if its any good.
For some odd reaosn, I hate renting books from the library. I just hate the fact of having a time-table for reading. If I don't like the book, then I can put it away and maybe pick it up later and attempt to finish it.