I will share my feelings on the book too, because I yesterday received my copy of the "Figone light and colour" one and now I can compare both.
I found Figone helps me more with just the five! first pages than the whole book of Angel. This is because maybe I am too "noob" or too low a level painter to appreciate Angel's work more properly. I also find the English on Angel's book is not of the best quality, and even though I am not a native English I can feel that, and I am not sure he has hired a good or professional translator for doing the work. That said, I think the level of language is obviously good enough to make you understand what he is trying to explain.
I will also point out that Angel's is not for begginers, because with those series of SBS you need to "analyse and study and do the hard work" on your side, I mean he is just saying mix vallejo refXXXXX + vallejo refYYY and not explaining why or how you need to do that on most of the cases, so you need to study and compare the info given on the series of pictures too, to get the idea of what you need to do to follow the method he uses, and that is airbrush plus brush for almost a 95% if not all of it.
On the other hand it is completely directed to infinity and SCI-FI models, so you got tons of info on painting mecha armours, and if you are more fantasy oriented like me, you would probably get a little bit disenchanted, because oh yes you have some skin and textils here and there but, that's it. Ah! the book also has a SBS on two busts, but I find them... ungraceful.
So I am sharing most if not all of the thoughts that persifal put in here some posts ago. In fact I would point out: buy Figone and or Betty edward's first if you are aiming to improve your skills with light/contrast/colour mixing, then, when you have practised or feel like you need some SBS on SCIFI models and some nice hints on using the airbrush and masking, go and buy Angel's book and, at that point (wich I stil haven't achieved) you will probably appreciate it more.
And sorry for putting this long post here, but I found it was on the line with the critique's on Giraldez book.
. I'm wondering, how you are able follow many threads here. It is very time consuming and my weak English don't help me especially wit writing. Some BloodAsMedium's responses are insane for reading and understanding and he is not alone 
