I bought this book as I am considering switching from a monohull to a multihull and I wanted to learn a little more about the differences between the boats. This book was well-written - the author's style is easy to read, clear and concise. However it didn't entirely scratch where I itched.
The author covers a good deal of ground in his book and I particularly liked his comparisons between the safety records of monohulls and multihulls. In many cases there aren't accurate figures but he worked with what was available to show that multihulls are no more dangerous than monohulls - in fact the reverse. And with the major danger that exists - capsize - he devotes a large amount of space to how to prepare for capsize, how to deal with it etc. This was a helpful, if slightly daunting, section with a lot of common sense. Yes, multihulls capsize but they don't sink and you can survive in one for quite a while if well prepared. And they don't capsize THAT often.
He also gave a significant amount of space to multihull designs, although again I think some of this information was a little out of date (an expected problem with an older book). The author definitely has his own opinions about what's good and what isn't and he speaks from the position of someone who likes to sail fast rather than potter about on a cruise (although a lot of other multihull owners, I imagine, prefer the relaxed cruising). He has designed a couple of boats himself and I found myself rather irritated at how often he showed us examples of his boats as proof of various statements about design - I felt he sometimes had a rather one-track mind about boat building.
My disappointment with this book, and the reason that I've only awarded it 4 stars rather than 5, is that he doesn't say a great deal about the handling differences between multihulls and monohulls and how they behave differently for passengers. A section on marina handling techniques, for example, would have been very useful as there are very different skills required here. Equally I didn't find anything that told me about the different methods one might use under sail to make the most of the multihulls' strengths - apart from speed, which he wrote about a lot (the use of drogues and parachute anchors to slow you down, for example). It was a good read and covered a fair bit of ground (including techniques to build your own boat - I wasn't too sure of the value of this information for your average reader) but it didn't answer all the questions I had so I will have to research a little further.
[EDIT] I subsequently bought Charles Kanter's "Cruising in Catamarans" (now republished as "Cruising Catamaran Communiqué") and that had far more of the information that was lacking in Chris White's book - handling, manoeuvring, the different feel of Multihulls. I think adding Kanter's book to the library gives a more complete picture, when read with this book.