this appeals to me on a level deeper than art normally does, for the same reason that i spent afternoons playing rivers, roads and rails when i was kid, or openttd a little later on.
I went through all the ones on his website and I think this one you posted and the one below are my favorites. The images on his website are ordered by year and for some reason they get brighter (happier?) with time... I just checked how much it would cost to buy a reprint... 250€+ :(
I'm particularly drawn to this one. flagamuffin, I got it as you can see. It's a nice book, I don't think you'll be disappointed. :)
I found the original paintings at this gallery, so if you have €6k that you don't need that's an option, otherwise I found the official reprints at Art Revisited (same publisher as the flag book) or this art webshop.