Thomas Jefferson and the Return of the Magic Hat

After almost six months in Maryland, fifth-grader Oliver still misses his friends back in New Jersey. But things start to change one day, when his neighbor, and possible new friend, Sam lends Oliver a magic hat that takes him back to the 18th-and 19th-century world of Thomas Jefferson. Oliver and his sisters-Cassie, the nice one, and Ruby, the annoying one-end up learning more about Jefferson than they'd expected. And Oliver finds that his new neighborhood might not be so terrible after all.