A little too late in 3rd Edition D&D's life? Not really...
While this would have had far more impact a year ago, Monte Cook seems to have a strong following and undoubtedly the 3.5 die-hards will be interested in what he has to say here.
Options, options, options... The book is jam-packed. Some are better than others, not all will suit every game style. But by the sheer wealth of ideas, many of which have gone pretty much untouched in WotC's official books, it's clear that Cook has a damned good handle on the system, and the many ways to use it.
I won't go point-by-point through the many options here. But the familiars and healing options are excellent, and stood out as something I'd likely use. As it is, this book gets a high rating, and is well worth the £5 asking price.
[5 of 5 Stars!]