ManaBook is a addon for Microsoft Word and is used to make managing of documents easier by incorperating many documents in to one file, these files then use the extension .mbb.
ManaBook makes it possible to save Documents to one file, as the software creates a table of contents it is easy to navigate and archive documents using it.
The ManaBook addon was created by MannBook Software, Inc.
How to open .mbb files?
Software to open .mbb files
What are .mbb files