PRS-505 a book is freezing...

hello
I use an old SONY PRS-505 which works perfectly. Untill yesterday, when I bought a book (to be honest is not allways a good idea!).
The book can be read up to page 12. And then the reader shutdown and reopen. but I cann't read the book.

Nevetheless, the book works perfectly with my Ipad, my telephone and my PC.

and all the other books work fine on the reader.

I suppose that there is a code problèm in the book? I cann't open the book even if I try to open a further page.

Thank you for your help

Duraton