Not aware of any app that can ready your physical books for you (plus I don’t know how many people would want to take the time to scan every page of a book to do so). Also, you wouldn’t likely be able to do it because you didn’t have the right to convert the book. You paid for a physical copy and not an audio one. There would be legal issues in an app that did something like this. But if you have a library card at your local library you can check and see if they allow for digital borrowing. If they do you can use the app they use and if they have an audible copy of the books you want to use you can check them out. My local library uses Libby for example. And if they don’t have an e-book or audio version (or magazines) that I am looking for I can submit a request for them to get it. If they do get it they alert me and allow me to be the first to borrow it (assuming I was the first to request the copy. Otherwise they will put me in the borrowing cue and alert me when it’s my turn to borrow).