PositiveThe New York Times Book ReviewThe founder and editor of the website Inside Philanthropy, Callahan clearly knows the game and its players. This has its drawbacks. Especially in the early going, the book can feel laundry listy ... Happily, Callahan hustles through the preliminaries and into a sweeping exploration of what makes mega-givers tick, how they operate and how they differ from their predecessors ... Many readers no doubt will share Callahan’s views on the dark side of Big Philanthropy, and his ideas for addressing it. But even those who don’t should give The Givers a go. Callahan offers a peek inside a rarefied, poorly understood world with ever greater power to remake the broader world. It’s an engaging, thought-provoking tour well worth the taking.