I just got through reading an ebook that was in EXE format. I had forgotten how nice EXE eBooks are.
PDF is boring compared to EXE
OK, I know all the reasons we use PDF, however EXE is still popular in non IM eBooks.
I always used eBook Paper and it is good. But, I just found a free one and I really like it. It has great security from password protection to a nag screen where you can put any security warning you want, and the security warning is repeated at the bottom of each page.
Here it is, I don't know why it's free but it is totally FREE. WebSiteZip Packer - Free Html to Exe, Ebook Compiler, E-book Publisher, Ebook Creator/Generator Software</font>