My magical practice has definitely been influenced by books other than specifically occult ones.
I am a big fan of science fiction, especially Ursula Le Guin. I have also learned from theory of science fiction (Speculations on speculation), for example in thinking about the nature of reality and how to bring about change. I also enjoy “literary” novels (science fiction at its best is literature, but that’s a separate argument).
I read about wildlife, landscape, ecology. For example, books by Robert G McFarlane, Tom Cox, and Tim Robinson are awesome. A classic is Food for free by Richard Mabey. And The Making of the English Landscape by WG Hoskins will make you look afresh at landscape.
History is fascinating. Ronald Hutton (of course), Simon Schama (Landscape & Memory is amazing), David Olusoga, Mary Beard, Alex Owen, Diarmaid McCulloch. Pelican histories (England, Europe, India…). History of LGBTQ2SIA & BIPOC people. Trade union history.
My favourite social theories are social constructionism and Michel Foucault. I liked Valerie Walkerdine, Pierre Bourdieu (cultural capital theory), RD Laing, Lev Vygotsky. Michel Foucault and the social constructionists influenced my thinking about how deities arise (along with Terry Pratchett).
Social psychology (especially studies on group dynamics) is very useful. One of my favourite social psychology books was George Lakoff and Mark Johnson’s Metaphors we live by.