I finished reading 1776 over the weekend--fantastic book. You may not think you're interested in the Revolutionary War or George Washington, but after reading this book you will be. McCullough's retelling of the dramatic events of that year is the main draw, but I also couldn't get enough of his descriptions of 18th century America. He's just a great storyteller.
Following up on this, next up on the reading list is Angel in the Whirlwind.