Acadia-The complete guide by James Kaiser

This is really a great read that gives a wonderful overview of the island.  Hits on the history without bogging you down and the colorful culture with lightness.  Kaiser goes over the highlights of Acadia National Park and points out some good hikes and quiet spots.  He talks about each of the towns on the island and their characteristics, what they offer and what to take in.  If you just want to get a good overview of the area this is a great book.