I’ve just finished reading the excellent Maximum vSphere book by Eric Siebert.
The book is 14 chapters long with 363 pages and contains information regarding vSphere (mainly 4.0 but also references 4.1). I found this book an extremely thorough and found a lot of information that I previously didn’t know. I was extremely impressed with Chapter 7 which contains information on monitoring performance within vSphere.
Simon Seagrave also produced some content for the book which I think was Chapter 14 which was how to go about building your own vSphere lab. Once again, another excellent chapter which contained a wealth of information.