i don't own his book, but did spend alot of hours at borders flipping through and reading various things in the book. the stats are all quite interesting, especially things that the average fantasy guy really don't think about but make sense, i.e. babib,gb/fb ratios, etc. his book really is just a more in depth way of projecting guys and their possible stats. he tells you why Nate McClouth for instance, can put up a certain level of numbers. not just an arbitrary, well he is young, hit 20 +HR and 20+SB last year, so expect the same.
if you are really into making your own personal rankings and projections, i think his book is a solid starting space. unfortunately, most fantasy players aren't concerned with going into that great of detail and prefer just to use someone else's projections or even shandler's projections. there was an excerpt that i enjoy, that basically said if you are just looking for projections, save your money and go buy a magazine. also the point that only 70% of all projections,at most, no matter who's they are, will ever be correct. this kinda of goes without saying, but when alot of people go into a draft thinking the projections will be good enough to make your team a winner, but in the end, its about so much more. injuries, trades, waivers, minor leaguers, etc.