OK: It makes no sense to build a meth lab in a basement with no ventilation, but then again, not everyone running a meth lab has much sense. There is nothing there which suggests anything to do with espionage or code, but there are a lot of things which connect with fine arts: Musical Instruments, lace, and so on. The books cover a wide variety of subjects, and the chemicals are not labelled in ways which a chemist would normally label them - but are labelled in ways which a jeweller or art restorer might do.
My guess is that this room was used by somebody involved in the antiques, jewellery or pawn broking trades. The Aqua Vitae is used for testing the purity of scrap gold, and the other substances are likely to be the sort used in the restoration of old pieces. That would also explain the basic chemical equipment.
The room would need to be secure, in case somebody tried to steal expensive items the craftsman was working on and would have to be holding onto for several days. It does not necessarily mean everything the guy was doing was legit. - there are crooks involved in handling stolen antiques and things too, but there is nothing obviously wrong here.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.