I've always worked with a designer handing off all the "aesthetics" part of my jobs, but had an interest on understanding better stuff like Gestalt, UI composition and such.

My focus was always performance and getting from point A to point B, and I never had problem recreating all the crazy stuff our designer made.

Which books you recommend on getting those concepts, so I can also help on the creative process of drafting an layout and such? Every time I try to apply the concepts I read about on my own, it sounds kinda "industrialized" so I'm looking forward some reading material