Please update the format for this book. iBooks will not open it anymore since the latest software upgrade.

This book is exactly as the paperback version. But it lacks a search feature and the ability to rename your bookmarks. This really hinders when you are trying to look up a word. You have to turn pages to find it. Also it being able to name your bookmarks leaves you confused as to which one is what you are looking for. Please update these features to receive a five star rating!!!