Wonderful app
This is a great app. Though it supports m4b books, I got an error saying it failed to parse metadata. I can't find a contact page to contact the dev, so I'm putting this here.
Not enough ratings yet to assess Paperback Mobile.
Paperback Mobile has limited verification signals. AppsHunter Legitimacy Score for Paperback Mobile is 58/100.
Based on 58 of 100 points across 7 verification signals from App Store and developer data.