I can't comment on the d20 mechanics here but this is a lovely book, with tons of interesting ideas. I'm really pleased that I picked this up.
[5 of 5 Stars!]
"It would have been nice to have a quick list of how many prints of type X or Y are needed to assemble the overview map."
That's a great idea, Sean. Thanks for that! I'll have a word with the developers and see if we can't do that for future products.
And thanks for the positive comments. I'm glad you liked the tiles.
Martin, Talisman Studios Publisher