Reading a book is step one

writing is step two.

If you want to get something out of every book you read, you need to write about them. No you don’t have to publish what you write, but you do need to write.

How I make my book reading work for me

I quite agree with Curtis on this.
Despite it may be time consuming reviewing a book a writing about it makes the ideas from that book stick much much better.

And after all that is the goal of reading.