I don't see any other replies, so I'll try. Not sure this is what's best, but it's my experience.

This probably depends on what subdomain you want to look at, such as networking, software patterns, forensics concerns, or even individual framework/hardware/language issues.

Network-https://smile.amazon.com/CompTIA-Security-Network-Fundamenta...

Cyber security and forensics- https://www.amazon.com/Engineer-Should-Security-Digital-Fore...

Patterns- https://www.amazon.com/Security-Patterns-Practice-Designing-...