The first American bookmobile was actually a wagon, the Washington County Library Wagon which took books to scheduled stops and made impromptu deliveries from 1905 till 1910, when it was hit by a train (O'Neal, 2012). Since then, the idea of overcoming geographic and economic barriers by bringing books to people has caught on.
Today, bookmobiles have evolved into digital labs on wheels. In summer 2014, the Edmonton Public Library put its first literacy van on the streets, calling it a "food truck for the brain" (Price, 2014).
Sources:
O'Neal, J. (2012, July 12). A brief history of American bookmobiles ... in pictures [Blog post]. Retrieved from
http://bookriot.com/2012/07/12/a-brief-history-of-american-bookmobiles-in-p...Price, G. (2014, July 24). "A food truck for the brain": First of four Edmonton Public Library epl2go literacy vans hits the streets [Blog post]. Retrieved from
http://www.infodocket.com/2014/07/24/edmonton-public-librarys-epl2go-litera...