Hey folks! I'm hoping that someone can recommend a book or two on herbalism - preferably ones where the author discussed the terpenes and secondary plant metabolites more than the magickal properties of the plants in question.

Currently I'm looking up plants through things like the NIH portal but would prefer to have some books I could reference as well; those studies are usually focused on one or two metabolites or compounds and it would be nicer to have that sort of information for each indicated use. For example: plantain (Plantago major) and comfrey (Comfrey officinale) are both used for skin conditions due to their production of allantoin; mountain mints (Pycnanthemum spp) are used in various ways for their production of carvacrol, menthone, isomenthone, β-elemene, limonene, piperitone, and germacrene D.

Thanks!