Good but keep improving, please!

1. I would like to see multiple highlight and edit options (e.g. Different highlighting colors and the option to underline).

2. You should also improve the versatility of the interface options (e.g. Page flipping vs. pulling) and overall stability (app crashes after many hours of studying/highlighting)
In a nutshell, it should be more user friendly. The kindle app does a great job at this, but the quality of the book is much lower than your.
Hope to see those upgrades in the next fantastic release!

Syprus89 about eBooks by Inkling, v3.9.6