I should admit my bias up front. There are those who like little short books that make one point and make it over and over. There are many popular books in our field that are like that, filled with stories that all basically make the same point and are just a couple of hundred pages long. They are heavy on fun reading and pithy quotes, and light on meat. If my company doesn't buy them for me, I usually like to borrow these, read the first chapter and last chapter and skim the rest.
The Persona Lifecycle is the other kind of book. It is a book that is large because it is packed with information and ideas. It is big, because the topic is big. It is organized in a way that lets you take it down from the shelf and just read the bits that are relevant to the problem you have at the time. Are you trying to figure out how to get started? Are you trying to figure out how to engage your organization in the effort, and in user-centered design through the use of personas? Are you trying to figure out how to make your personas more effective? Are you trying to figure out how to drive more business value out of them? There is something for every situation.
There isn't just one way to get value from personas, and so a checklist or cookbook isn't appropriate. What are appropriate are principles that can be used to figure out an approach for a particular context, and lots of examples.
Furthermore, it is a book that doesn't just live in the world of theory, or pontificating about a point of view in order to justify a consulting business. It is a book that is filled with practical advice and the experiences of those who are using personas in their jobs.
This is a must-have resource for the HCI professional's shelf.