From a sweaty, near-catastrophic Shark Tank demo to a billion-dollar acquisition by Amazon, Jamie Siminoff's story of founding Ring is the ultimate underdog tale of invention, grit, and relentless reinvention. While tinkering in his garage to solve his problem of missed deliveries, Jamie hacked together a Wi-Fi video doorbell. His wife called it a safety game-changer. The Sharks called it a pass. After walking away from Shark Tank empty-handed and broke, Jamie rallied a ragtag team of Craigslist hires and turned rejection into rocket fuel. Through near-bankruptcy, factory disasters, and wild wins, complete with celebrity investors like Shaq and Richard Branson, Jamie built one of the most iconic consumer tech brands of all time. Told with unfiltered honesty and humor,  Ding Dong isn't a polished success story; it's a blueprint for anyone who's been underestimated, rejected, or told to quit. Because when opportunity knocks, the real question is: will you answer the door?