This book is an exploration of the often crazy world of map-geeks - people who just love maps and geography. Written by Ken Jennings, famous for his record run on Jeopardy, it's full of wit and trivia, and really hit home with me, as a map-geek.
This is a book for people who get lost in maps for hours, even maps they've stared at for hours before. He explores subsets of map love: the national geography bee, travel clubs, highpointers, road geeks, geocachers, etc.
It's fairly well written, but thorough - a strong 250 pages. You have to really love maps to get through it, but I found myself pining to get back to it. I found out about all sorts of random facts (like a fake city google accidently added to maps or the gps coordinates for a triple island in Canada - an island on a lake on an island in a lake on an island).