I read four different books for this exam they all helped on different parts. I didn't feel any of the books covered everything I ran into on the exam. Probably the one that helped the most was
File System Forensic Analysis by Brian Carrier. The other three were:
Forensics Discovery (Dan Farmer)
Read Digital Forensics (Keith J. Jones, Richard Bejtlich, & Curtis W. Rose)
Incident Response and Computer Forensics, Second Edition (Chris Prosise, Kevin Mandia, & Matt Pepe)
Tutorials : Hacking Scenarios 
Hadnagy : [Article]-An Insider`s Look at the Social-Engineer.Org SE CtF at DEFCON
Editor-In-Chief : Free Webcast: Don't Pick the Lock, Steal the Key - PW Auditing with Metasploit
Links to cool sites. : Ninja-Sec Challenge You !
Tools : Nmap 6 Released
