One of the latest sources of inspiration in my magical work is a series of books by Christopher Alexander where he explores how to create life through architecture (affiliate link). While these books admittedly, on the surface, have little to do with esoteric secrets for summoning spirits or the other types of occult lore that is usually so favored by occultists, I nonetheless find them to be quite inspiring because of how they look at the process of creating a building where people feel a sense of life. There is something profound about a discipline that explores how to bring life to the process of building.
And I find that it carries over to magical work, provided one is willing to explore the possibilities and perspectives that are offered. I’m only a bit over halfway through the second book of the series, but nonetheless I have discovered a profound amount of insight and knowledge that be applied to both space/time magic in specific and magic as a discipline in general.