I wrote the free ebook
My Cybook Opus Ebook Reader - Adventures of a New User. It tells my experience in choosing, buying and using a Cybook Opus ereader. It collects and reorganizes a series of posts titled
Adventures of a new Cybook Opus user I did to the discussions section of the BOOKEEN page on Facebook, in which I told my impressions and comments about the Opus.
The book can be downloaded and shared under a Creative Commons license, and is available in ePub and Mobi format.