Yes, I am that big a font nerd - I not only paid for this book, but also savored it in little bites so as to draw it out almost three months.
If you love typography, then you don't need me to tell you how fascinating this is. For the rest of you - fonts and their good/bad selection affect nearly every part of your life. Imagine if road signs were hard to read - you'd crash trying to read them, or drive past your intended destination and get hopelessly lost and then be eaten by a bear. Either way, you die. And it would all be the font's fault.
The history of type goes back more than 500 years, to woodsmiths carving out EVERY SINGLE LETTER, backwards. Can you imagine: it makes you appreciate the simplification of drop-down menus in Word, now, doesn't it?
This is a really good book about an invisible art. You know, if you're into that kinda thing. :)