Self Studying for SANS SEC 503

Hi everyone!

My employer is sending me for SANS SEC 503 to prep me for a new role. For those who've taken it before, I'd like to get your advice on suitable reading material for me to read up and prep for it.

I come from a non tech background and have spent my last few years working as a CTI strategic research analyst.

Some old blogs recommended resources like:

1. Network Intrusion Detection 3rd Edition by Judy Novak and …

cybersecurity sans sec