I passed the 642-524 exam on Saturday. This was the hardest test so far in the CCSP series. I used the the following material to study for this test:

• CCSP SNAF Quick Reference By Andrew Mason
• Cisco ASA, PIX, and FWSM Firewall Handbook, Second Edition By David Hucaby - CCIE No. 4594
• On the job training

I willl now start working on the elective exam 642-515 SNAA Securing Networks with ASA Advanced.