Painful to use – Bookshelf Review

This app was acceptable on my Mac and iPad until the most recent update. I use it for my coding courses and trying to use it for looking up codes - especially one book in particular - is VERY painful. Clunky and slow and the search function doesn't work half of the time. When scrolling through, the text disappears, and then once it shows back up, I can’t figure where I am in the text. SO frustrating! It's the same across all devices. Please please PLEASE fix this. I actually HATE this app right now.
Review by karriesunshine on Bookshelf.