My grandfather was a history professor and Benjamin Franklin scholar. We grew up playing fun games with him - like giving him a random date and he'd tell us something cool that happened on that date, or he'd drop interesting tidbits about historical people, and we'd try to guess who they were - he built a love of history in us that has enriched our lives. Friends of mine recently penned a new book that I know he'd have loved: Philadelphia Liberty Trail: Trace the Path of America's Heritage.