On a first flick-through, my initial impression of this is that it might be trying a bit too hard. I don’t get a sensation of a progression, but rather of a lot of rather small and slightly confusing illustrations. There’s no doubt that some of the pages are well laid-out and packed with good ideas, but I constantly seem to be tripping over a lot of small and very similar details, many of which are rather murky, and then pages of brushes and colours. I see there’s also a chapter on using computers. Like I said, there’s a difference between being packed with information and overloaded with it.
Some, indeed most, of this may well be down to the fact that I don’t really understand the language of fantasy art; I’m afraid it’s all geek to me, so I’m probably just not picking up the gems that may be on offer. However, if this were something more in my comfort zone, I can’t help thinking I’d still feel the same, so my advice would be to have a good look at it before you buy. If it’s for you, I’m sure you’d get a lot out of it, but if you feel the same way as me, that’s thirteen quid I’ve saved you.