Really easy to navigate sections on all aspects of non-fiction writing.
Also check out fiction, non-fiction, book reviews and the sale section.
You can obtain all kinds of knowledge on novels, poetry, non-fiction pieces about writing and biographies as well as download eBooks for various eReaders based on the Harvard Classics & Shelf of Fiction.
Clancy has also written non-fiction pieces offering perspectives of the branches of the military and specific units.
Instead of searching the adult non-fiction section of the library, look for origami patterns in craft books in the children's section.