Criminal Justice http://www.getcollegecredit.com/downloads/factsheets/Criminal%20Justice_20080509.pdf DSST Exams http://www.getcollegecredit.com/resources.html#brochures The best single resource I found for this exam was Criminal Justice (Cliffs Quick Review) by Dennis Hoffman.
I agree on the Cliffs Quick Review series. I am using several of them to study for the Social Sciences and History CLEP exam, and I have found them to be perfect for the kind of review/studying I am doing. I highly recommend them for any subject. http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Daps&field-keywords=Cliffs+Quick+Review&x=0&y=0
Text book I bought and read a criminal justice text book from a used book store. The author was James Inciardi. It was perfect prep for this exam.
I did not prepare for this one. I took it right after Law Enforcemen (5 minutes apart) and passed. This one is another "super easy" one.