Bibliography:Aleph-0

Edward Kasner and James R. Newman, Mathematics and the Imagination (New York: Simon and Schuster, 1940; currently in print in paperback from Dover in a 2001 edition, ISBN 0486417034), a book for non-mathematicians, contains a chapter (chapter 2) explaining Aleph-0 and other transfinite numbers.

see Cardinality/Bibliography for more references