Book Beginnings on Friday is a meme hosted by Gilion at Rose City Reader. Anyone can participate; just share the opening sentence of your current read, making sure that you include the title and author so others know what you're reading.
An Empire on the Edge: How Britain Came to Fight America by Nick Bunker
"In the summer of 1771, the Mississippi River marked the western boundary of the British Empire."
Turns out one cause of the American Revolution that I've never before heard discussed is that the colonists needed help and advice from the British government on what to do about the "western" part of the colony (Ohio), and the word from England was, just ignore it. Well, that doesn't work, particularly when there are displaced native peoples in those areas, and when some colonists are determined to go west no matter what.