Thanks. I am glad to know the lighting makes sense to you
Regarding Andrew Loomis, he has books on figure drawing, illustration, face drawing, and a regular drawing book (Successful Drawing). His book seems to be written for artists back then (for example, he talks about drawing for advertisements, and this field at the time seems more contextualized for back then, to me, at least), but his books are still very good because he talks about foundations very in-depth in terms of perspective, anatomy, faces, hands, values, shading, lighting, etc. Particularly, his illustration book has a very good section on composition.
I still reference his books from time to time (along with others, like Michael Hampton's Figure Drawing book). His books are well-worth your time.