Articles and Books:

Richard, Johnsonbaugh (2000) Discrete Mathematics, Prentice Hall , NJ.
(Order from amazon , order from Barnes and Noble , compare at bigwords , compare at CampusBooks4Less , order from Chegg , or search eFollett )

Epp, Susanna (1996) Discrete Mathematics with Applications, Brooks Cole , Pacific Grove, CA.
(Order from amazon , order from Barnes and Noble , compare at bigwords , compare at CampusBooks4Less , order from Chegg , or search eFollett )

WWW Pages:

Discrete Mathematics Project (teaching discrete math to K-12 students
Kemeny collections on Finite Mathematics
Wikipedia