I like to let the audiobook flow through me on long runs like a guided meditation on a topic. The end effect is like having the book’s lessons embedded deep in your subconscious. There’s a special magic in engaging with a single topic over several focused hours that I’m too distracted to reproduce with a physical book.
If I need details or quotes from the book, or if I want to use it as a lookup reference, I like to then get the physical book. Now my audio read serves as a fast lookup table that helps me find the details.