I have EBooksWriter. What is the difference with PaperKiller (PK)?
The EbooksWriter can create self-extracting ebooks, i.e. it can transform an AEH file to an EXE file that a user can click and see (without anything else installed). With EbooksWriter you can also password protect pages or set of pages (they will be encoded with a strong 128 bit encryption). You can also disable print or clipboard copy. The interface is very similar to PK, and you can read PK files.