Recommended study material for DSST Cyber Security

[Jccano00]

Hello all,

I'm gearing up to tackle the DSST Cyber Security for a UL class at TESU, however I'm looking for recommended materials to study for this exam.  I've read mixed reviews from the Peterson's guide on Amazon, and i'm hoping to hear your experiences to find the best book to read before sitting for the exam.  I've been in IT for a while now, with a varied background: networking, VoIP & Windows support.  

Thanks in advance