I don't read entire non-fiction books anymore but just search for it's summaries or notes. Most non-fiction books revolve around a few central ideas. Once you internalize this you realize it isn't necessary to read the entire book. You just need to read the summary and notes that someone else has written. For eg : I'm currently going through the book notes that Derek Sivers has written and just posted this last night…
A big advantage of taking the time to read a book, even if the book has just one central idea, is that it forces you to spend 5+ hours thinking on that idea. No summary can do that for you. I'd even go so far as to say that it's not even important which book or idea you spend that time on; just spending time with your own thoughts and imagination will teach you things no non-fiction or summary can. I do agree that su…
I for example make notes of the notes and then re-visit them frequently over the next few days. This helps me visualize and concretize the ideas in different ways since I'm revising them at different times. In the interim I'm trying to incorporate them in everyday life.