Great until last update

I downloaded this app because my friend had it and it was awesome. Worked on his phone fantastically but apparently there was an update between me using it on his phone and downloading it myself. Now its buggy. When I try to zoom it closes me out of the app. When I restarted it afterward the page was super zoomed in and I couldnt zoom out or even move the page. I cant even see half the page anymore. I loved this app but this update or whatever ruined it.

Pinay517 about eBooks by Inkling, v4.0.2