Security in Computing, Third Edition is a sweeping revision of the field's classic guide to computer security. Thoroughly updated to reflect the latest Internet-based threats, it shows how to control failures of confidentiality, integrity, and availability in applications, databases, operating systems, and networks alike. It offers exceptionally clear and accessible coverage of cryptography and other technical issues; security administration; law, privacy, and ethics. New coverage includes wireless security, intrusion detection, quantum cryptography, biometrics, DRM, AES, honeypots, online privacy, and much more.
This book covers security at Many different levels (tries to be comprehensive)... although this is a constantly changing topic of study, every time new tactics are used by some hacker/virus/trojan...etc.
Topic included are: the "Meaning of Computer Security", Attacks & methods of defense, cryptology, software(code) security, Viruses, root-hacks, Operating system security, Trusted-systems, File protections, Database security, SQL injection, Multi-Level approaches, Networks, firewalls, Vlans, Session hijacking, flaws in net protocols, Web site vulnerabilities, Alarms, monitoring, countermeasures, Administration, Risk Analysis, Physical building security, Data privacy, computer ethics, Email monitoring or interception, spoofing, phishing, computer crime, code of ethics, SOA Architecture, and more...
This is certainly not a "light read" or something you complete in a week; but for somebody who runs computers professionally, there is a lot of info here -so you know several problem issues to avoid when designing new computer systems.
I would also recommend knowing the ISO-27001 and ISO-27009 standards, and similar security standards from OWASP (Open.Web.Application.Security.Project), plus Oasis-open.org guides.
This book has some great high level information on computer security and is heavy loaded with the computer security's industry lingo. However, it does not cover details on hacking techniques and the content is quite verbose - not very succinct. Additionally, this is not the latest edition of that book.