I need someone in Azerbaijan to take a close up of that black & white photo in the foreground!
AKA Zeïnalabdine Taguiev
Source: http://www.wikiwand.com/fr/Mus%C3%A9e_national_d%27art_d%27Azerba%C3%AFdjan
There are quite a few in book form at older libraries (library catalogues). You could try the LibraryThing Legacy Libraries to start, and then try to find the books on archive.org!
Absolutely, it really is a tangible form of mind-mapping. There's a really interesting program called MindManager. I haven't made use of it yet but it seems to be exactly what I need :)