The App does not work correctely
I have paid 10 Eur to unlock all the features, I‘m not shure if I was asked to confirm my purchase. I saw afterwards that the 10 Eur are only for one month! The app did not find the 4th book I searched for, written by the author Bernhard Schlink, nor did it find the Isbn-Code. When I click on the detail of a book, there is only a blank page. When I click on similar books, a blank page! The connection to Amazon Kindle doesn‘t work either... I want my money back!