[Nick Zwar]

There is the wonderful “Dimensioni Sonore” (Sound Dimensions) by Ennio Morricone and Bruno Nicolai, which covers a wide range of moods in many self contained pieces. Really good stuff. As noted, library music tends to be more like an “etude”, usually they are self contained miniature compositions rather than developed scores, so listening to this stuff is like eating Potatoes chips… you can have one or two or three or a whole bag. 🙂
Composing library music allows the composer to explore ideas or techniques in short form, without having to conform and commit the material to a larger scale composition.