Do you read the inside flaps that describe a book before or while reading it?
If it is a random book that I am picking up based on its cover *gasp* or one that I got off a list and heard nothing about, then yes. If it's something that was recommended to me or something I know I want to read, then no. I tend to have read reviews online or I just know it's an author I like so I will pick it up. I also very rarely read the cover for James Patterson books or the Kinsey Milhone series by Sue Grafton or any mystery book for that matter. It tends to ruin the book for me because I figure out the "surprises" from the cover.
What about you?? Do you read the flap / back cover? Are you like me and pick books by their cover?? :)