A finished help book is a folder (directory) on the drive with files and folder inside. As a rule, the folder is named 'help' and resides just in the directory where the application has been installed.
The contents of the help book folder is as follows:
help/
chapter1/ ; chapter 1 in the subfolder of its own
index.html ; start page fo the chapter 1
... ; topic pages of the chapter 1
yhgfx/ ; auxiliary folder with graphi
book.png
...
cont.css ; style sheet for the right frame
help.html ; frameset definition
help.js ; master scripts
idx_A.html ; file of indexed phrases started with letter A
...
idx_Z.html ; file of indexed phrases started with letter Z
index.html ; content at a first glance (list of chapters)
navi.css ; style sheet for the left frame
popupref.js ; sñripts for the topics that invoke pop-up notes
popup.js ; scripts for pop-up notes themselves
toc.html ; table of contents
yhusing.html ; file of the topic on using the help book
... ; files of top-level topics