X2Net WebCompiler 

A powerful HTML Compiler produces .exe files for distribution from groups of HTML pages. Support for all modern HTML. Built-in searching, favorites management, page protection, passwords, kiosk mode,form processing, encryption etc.
html compiler web e-book

unWC 

unWC is a good .exe type ebook decompiler. unWC can extract all source files from .exe ebooks which were compiled by Webcompiler.
ebooks decompiler decompile ebook decompiler extract convert recover exe ebooks