The Mayflower by Nathanial Philbrick
The first part of the book seemed very good overview of the circumstances and story of the Mayflower, very well worth reading.
The second part involved the King Phillip's War, primarily regarding a descendant from the Mayflower voyage Benjamin Church's involvement, although other events covered from a big picture perspective.
The transition between the two seems to leave something to be desired.
I'd say this provides a good general place to start on these topics though, and the first part was very good.