Looking at Don’t Lick the Dog: Making Friends with Dogs, I had to remind myself to never judge a book by its cover. The book looked like a silly, frivolous picture book that was created just for fun, with bright, bold pictures and silly sentiments. So you can imagine how surprised I was to learn that the book had lots of substance—which, I reckoned, it should have, since I found it on a forum about books that pack a positive punch about animals.