Resources used for my CCNA Cyber Ops Studies:

CCNA CYBER OPS SECFND 210-250 OFFICIAL CERT GUIDE

Authored by Omar Santos CISSP No.463598,
Joesph Muniz CISSP No.344594 and Stefano De Crescenzo CCIE No.26025

Published by Cisco Press

CCNA CYBER OPS SECOPS 210-255 OFFICIAL CERT GUIDE

Authored by Omar Santos CISSP No.463598, AND Joesph Muniz CISSP No.344594

Published by Cisco Press