I have a couple of these books.
I have mixed feelings about them to be honest.
At first glance they are very attractive and inspirational, but then when you read it a bit more carefully, you see that some of the techniques are not terribly insightful, and a lot more material is repeated from issue to issue...
Sorry. It's very easy to knock - and you really have to hand it to Paul Darnell for trying something different and ambitious. And his mega-big layouts always do look utterly fantastic.
But there are a couple of things that irritate me about these books...
One, why oh why does he always paint his rivers pale blue? Have you ever actually seen a sky blue river?
And two - why does he airbrush out the bases of the figures in all the pics? It's just wrong! We all know they're wargames figures. It's a book about making wargames terrain for wargames figures to fight on. And then the bases are taken out in photo-shop! Just feels a bit inauthentic somehow...

Anyway, enjoy reading them, and never mind me. At that price for the set, you can't really go wrong... As mentioned in another thread on this topic, had Paul adopted a slightly different pricing model to start with (i.e. more volume at a lower price) I think Touching History would have stood more chance of succeeding. But I've no way of proving it!
