1. Raptor Red - This fantastic novel by esteemed paleontologist Dr. Robert T. Bakker is unique, as far as I know, when it comes to the combination of accurate scientific information and a story told from the first-person viewpoint of a Utahraptor. It might sound weird, to be sure, but don't judge it until you read it: this is one of the best books I have ever read! I have only heard one person ever say that she didn't like it, but then I discovered that she had not read past the first chapter....oh well, fun isn't for everyone, I suppose!
2. The Song of the Dodo: Island Biogeography in an Age of Extinction - This is another one of my most favorite books. Written by David Quammen, it explores islands from all over the world, as well as some from the past, too, and also discusses how island biogeography can be used today to help stop the extinction of mainland species. Fans of the well-known Jared Diamond (author of Guns, Germs, and Steel) will certainly enjoy this book and, in fact, Quammen references Diamond throughout the book, as well as many other eminent scientists. Quammen's quick but subtle wit helps to make this book a classic.
4. Tasmanian Tiger - The Tragic Tale of How the World Lost Its Most Mysterious Predator - This excellent, albeit sad, chronicle of the downfall of the Tasmanian Tiger, or Thylacine, is an absolute must-have for any nature fan out there. Written by David Owen who, along with David Pemberton, wrote the similar book entitled Tasmanian Devil: A Unique and Threatened Animal (a book which I also highly recommend), both books are excellent reads.