I have listened to twelve rules for life by Jordan B. Peterson and this summary was quite good. I have not paid for the premium version, I am still on the free version. This app is very good. I pay for Blinkist and Audible and this app QuickRead is great and it is free. Changing the playback speed is possible only if you buy the premium option. You can also sync to your kindle if you pay for the premium. I think I will stay with the free version. I am very happy.