a book by its cover

Today was a nutso crazy day! i had all my sisters and their kids over for a picnic.. What was i thinking?? anyway, my sister was investigating my "library" and she picked up my copy of Iris Murdoch's A severed head. it was an older copy... but she loved the cover.. she said she needed it.. so i let her have it.. but if she finds another copy she has to get it and replace the one she "stole"! I just think its funny that someone could pick out a book just because they like the cover. strange!