The Wordy Shipmates (2008) is Sarah Vowell's rambly exploration of the early years of Puritan settlement in New England and its impact on American culture on through to the present day. And I had a lot of fun reading it because I kept imagining it in her voice.
The key word here is "rambly." Linear this book is not, and I wonder how much sense it would've made to someone who didn't go in with a fairly solid grounding in American colonial history. Then again, maybe her audience is only other history geeks like me and it doesn't matter.
Anyway, if you like Sarah Vowell, you'll like this book. Reading it made me wish I could hang out with her and geek out over historical crushes and obsessions, because she talks about John Winthrop, Roger Williams, etc. just the way I talk about the Duke of Wellington, Eugene de Beauharnais, etc.