"An introduction to how cryptocurrencies like bitcoin are just one example of transformative applications that this relatively new technology makes possible. The author interprets the complexity into digestible anecdotes, metaphors, and straightforward descriptions for readers who don't know tech, and explains all of blockchain's most important aspects: why this so-called digital ledger is unhackable and unchangeable; how its distributed nature may...

Bringing together some of the best profiles from his popular "What Would You Do?" news features, the award-winning ABC journalist introduces ordinary Americans from a diversity of backgrounds, ages, and walks of life whose small acts of courage, kindness, generosity, and decency have made the world a better place.