Traitor: The Case of Benedict Arnold, by Jean Fritz

"America's most notorious traitor is brought to life as Jean Fritz relays the engrossing story of Benedict Arnold -- a man whose pride, ambition, and self-righteousness drove him to commit the heinous crime of treason against the United States during the American Revolution." --textbookx.com
If you like history, especially American history, you'll like this book. A good story overall.