Raptor:
"Library Books" is a misnomer. Probably should be "Tech Help". It opens a folder containing compiled help files from wherever I can grab them. These much overlooked files not only have great info, most times they have examples that can be cut and pasted into my existing code.
I also understand Microsoft has free software you can use to create your own.
After many years in IT, and still hunting and pecking on the keyboard, these files are a great timesaver.