A new book, "Hatching Twitter," depicts the social network's rise as being marked by feuds and betrayals involving its co-founders. The book recounts Jack Dorsey's successful bid to sabotage fellow founder Noah Glass, and Evan Williams' efforts to sideline Dorsey and shape Twitter according to his own vision. Williams was eventually ousted and replaced with current CEO Dick Costolo. "Costolo remains at Twitter's helm. But if even half of 'Hatching Twitter' is true, he'd better watch his back," Rich Jaroslovsky writes.