Want to recommend a service called Blinkist that provides, short read summaries of classic and new non-fiction books. I find that personally, there are far more books that I'm interested in than I have time to read. Blinkist is a relatively new service and you get a free trial. After the trial, I think it is $5 per month, which seems steep except it is certainly lower cost than buying all the books. You might take a look if you are into non-fiction.
And it works on iPhone which I use all the time.