A useful guide, more for a regular intermediate or advanced player. Went straight into too much detail for me.
Useful if you really want to make a potential living from poker but excessive if you just want to do better against some friends 3-4 times a year in low stakes games.
Out-of-date for the professional aspects of poker and a good deal of the private games, but some timeless insights into human nature and how to manipulate it (or more optimistically, avoid being manipulated).