I can't get enough of this app. When I found the discovery and realized I could get books for free I have used the app every day. As a teacher, wife and Mother being able to escape for a little while is good for me and everyone around me. I LOVE TO READ, but didn't always have the time. Now I can listen while shopping, driving and even cleaning. What I think they need to change is in the Discovery section allow you to put in included in membership then pick genres. I get a little frustrated scrolling, finding a book then realizing it is not included. I use my 1 credit when I get it and done in couple of days. Have 27 days left and need to use free library- just wish that was easier to navigate. Other than that if a Prime member the cost is SO WORTH IT. One other quick note LOVE THE INFO WHEN CLICK ON BOOK it help me decide if I want it or not easily. If you love to read and don't have time this app is a must!