Ah, I do this as well! Additionally, if review quotes mention a book is alike to another or even an author's writing that I like, I will pick it up. One I just picked up today on pure chance after reading Hitchhiker's Guide to the Galaxy was quoted as saying, "Wholly original, and by turns annoying and exhilarating, this antidote to formula fiction reads like Douglas Adams channeling William Burroughs channelling Ionesco, spiced with the comic brio of Vonnegut." Had to get it.