Great but ..

This is a very great app .. I like it and I like how it is structured in a good manner.
However, there are two tiny points which I wish the publishers will improve:
1. To add more colors for highlighting.
2. To not remove old editions from the database. Actually, I bought an old edition of a book, and when I tried to use the redeem code it didnt work. When I contacted the Student Consult, they told me that my edition is removed from the database, thus I cant get it.

M. Uncle about eBooks by Inkling, v3.9.6