Pre-War book (Fallout: New Vegas)

A Pre-War book is a book that has not been destroyed, burned, or otherwise rendered unreadable. It is a fairly rare item in Fallout 3, however in Fallout:New Vegas the books are extremely common (Goodsprings alone having well over a dozen of them) and come in a variety of colors. In Fallout 3 it is desired by the Capital Wasteland Brotherhood of Steel. Specifically, the Brotherhood Scribe Yearling, located within the Arlington Library, will reward you with 10 XP and 100 bottle caps per book for contributing these to their archives. See Yearning for Learning.

Locations
G.E.C.K. shows that there are 110 Pre-War Books ("BookGeneric01") in the game, more are added with add-ons. The links below often tell you where to find them: