It is a bs-free book on how real estate works - the honest and true motivations of agents, clients, and their relationship to the marketplace.
Every other book I've read has a substantial degree of cheerleading. Heaven love Danielle Kennedy, but Stacey, to my mind, really nails it.
One of my favorites is Jen Allen's SELL WITH SOUL.
I also like Carla Cross's Up & Running in 30 days (for new agents).
Dirk Zeller's books are recommended. "The Champion Real Estate Agent" is great.
I do like Keller's books especially SHIFT in these changing times.