I had not come across Wikibooks before, which is a collection of textbook 'modules' created in the Wikipedia model. Wikibooks is one of the Wikimedia family.

Naturally enough, coverage is still intermittent. I do not know what sort of momentum it has picked up.

There is a skeleton - if little more - in place for Library and information science. (This is as part of the proposed Wikiversity, 'a wiki-based learning community'. One aspect of Wikiversity proposals sees the development of a range of learning materials, which would use, but also go beyond, the materials being developed in Wikibooks.)

From the Wikimedia home page:

Imagine a world in which every single person is given free access to the sum of all human knowledge. That's what we're doing. [Home - Wikimedia Foundation]

YAGWALLM - yet another group with a library-like mission.