I have found the problem, I noticed this message when looking at the item info of the book "Document contains a resource which is too long". So I used the power of all mighty google and found this ;
REASON
The Sony PRS-505 (and other readers) have a limited amount of memory. In this particular example, the maximum size the reader can manage for a single chapter is 100k. However, in some cases epub developers make put an entire book into a single chapter, breaking this limit. The content will display without issue in Digital Editions because of the greater amount of memory available to a desktop computer.
> No solution listed
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