OpenHelpBook.scptd is required to display a Help Book setuped in a scrip bundle in Help Viewer. OpenHelpBook.scptd is an AppleScript Library to register and display Help Books in any bundles in Help Viewer.
In my enviroment, AppleScript libraries which have its reference manual in onw bundle are placed in Script menu. Execution of the scripts from Script menu cause to display the manual of the script in Help Viewer. This is useful to quickly lookup the manual anytime you want.
To make excution of the script display own help book in the Help Viewer, discribe run handler as follows after installation of OpenHelpBook.scptd.
See OpenHelpBook's manual for more details.