Whether you're a would-be entrepreneur, a hard-core geek, or just a gadget lover, it is hard to imagine a bigger thrill than inventing something and sharing your creation with the world--and maybe even making a profit somewhere along the way. Gadget Nation celebrates that spirit through the irresistible, often quirky stories of more than 100 amateur inventors and their gizmos, from lighted slippers to an alarm clock that rolls away from you when you reach for the snooze button.