If you're looking for technical, precise and comprehensive information about HA, DRS, and Storage DRS, well... This is the book for you. Frank and Duncan use a linear and fluent writing style, with excellent examples and real world scenarios that give you a perfect understanding of the inner logic of all the involved components. Great info on the new features in v5, and how and why some things have radically evolved (e.g. HA).
Loaded with precious tips and detailed information, it's a must have wether you're a clustering newbie or a seasoned vAdmin.
Oh, and what about the money? It's weeeeell worth the price!