@odd Good point! I will be adding that along with a number of tweaks. Being a compendium its not about one subject, rather it has a theme, the built environment. If you're interested in how the built world is made, and maybe why things are the way they are then hopefully (if I've done it right) this will appeal and give you some concentrated insight - but totally understand if this is not your thing (my own brother isn't interested...but then I'm not interested in Crypto and he is absolutely killing it in his writing in that space :).