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…
- changed my life - read summary first, if really good, buy and read book - cons are 1) makes you think less about content 2) may be too easily forgotten 3) retention isn't as high as reading a book that hits theme over and over with a sledgehammer 4) ignore books with bad review that may be useful to you