As far as 'functional' goes, that really depends on what your definition of 'function' is, whether it be GPP or SPP.
I have How to Eat, Move and Be Healthy! and found it was useful when I had little structured knowledge on training, and I still follow many of the dietary recommendations. It is a very useful resource - geared towards GPP, but it if you're a regular reader of T-Nation then there won't be a lot of lifting information you're not aware of. There is a good PNF stretching routine included, as well as mobility/energising movements which are pretty cool.
If you're already an accomplished strength athlete with few injuries there will still be useful info in the book, but I think it's more targeted at those who haven't been reading T-Nation! (He has written some articles for this site, by the way.)
His website has info on all his products, and I'm sure Amazon and a search on T-Nation will yield reviews on his work.