Below are some books I have related to cyber security:

PENETRATION TESTING AND NETWORK DEFENSE

Authored by Daniel P.Newman & Andrew Whitaker

Published by Cisco Press

CEH: CERTIFIED ETHICAL HACKER VERSION 8 STUDY GUIDE

Authored by Sean-Philip Oriyano

Published by Sybex/Wiley

*note the link is to the current version of this study guide.

CCNA SECURITY 210-260

Authored by Omar Santos CISSP No.463598 and John Stuper CCIE No.11154

Published by Cisco Press