All ebook reading apps are designed to restrict any kind of editing while leaving open the possibility of adding notes and highlighting (without changing the original file). (publishdrive.com)
This new notes system allows users to share their book notes and highlights for the general public to see. (goodereader.com)
Another interesting new detail is that it shows the number of notes and highlights under a book, along with the percentage read and an estimate for finishing the book. (the-ebook-reader.com)