You get the thank-you card, the book in PDF and in hard copy, and the press kit in hardcopy as well. And I'll also throw in the PowerPoint slides. AND I'll also put your name in the book as a project backer, with my thanks for your support!
You get all of the above, and I'll also give you a copy of "Iron Age", the political strategy game that I invented as a critical thinking and social justice exercise for my students. Not just the plain-text Kindle edition - I'll give you the awesome illustrated print edition! See my web site for more info.
I'll send you all the above, and in case you haven't got enough stuff to read I'll also send you a printed copy of my doctoral thesis, "Time and the Land: Four Approaches to Environmental Ethics, Climate Change, and Future Generations" (NUI Galway, 2005). This text is not published anywhere, and you can't download it from an archive, so it's a very limited edition.