Thanks for the replies and sorry for the late one but I was on the move
So... what we think it is simple, it is extremely difficult for her, long story she cant manage the front page, can't cope with the most basic navigation of picking the next book and because that middle button thingy is very easy to misclick, any popup of any sort and she is done for. But you have actually given me the greatest EVER answer - combine all books into one giant freaking book!!! She does not care to pick a book, just that there is one to read, so next, next next... when the next button wears down will remap to something else and moving forward
Thanks all, love you <3