The book has firm binding and clean pages. There are no markings. ~ "A is for Atom, B is for Black Hole, C is for Clone-hang on to your test tubes, we're covering a lot of ground here! But both the science-curious and the science-phobic are in for a treat as the author of one of the wittiest math books around takes on a new topic. Ranging freely from DNA to jet-propelled squid to proof that it's best to prepare dragon tonic using the metric system, this smorgasbord of science topics makes a great classroom resource or gift for the budding scientist. By the time kids plow through all the quirky pictures and funny captions we're sure they'll agree that W is for Wow!