No single book can tell the whole story of anything. This is especially true of a multidisciplinary subject such as data protection. Following is a list of some of the books that I refer to on a regular basis. Some provide more detail on specific subjects; others, simply a different point of view.
Building Storage Networks, by Marc Farley (Osborne/McGraw-Hill). This book is still one of the most comprehensive tomes on storage technology. It is a soup-to-nuts reference book on all things storage, especially storage networks.
Using SANs and NAS, by Curtis Preston (O'Reilly). Short and concise, this book's strength is its excellent explanation of backup and restore.
The Essential Guide to Telecommunications