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Become a well rounded "Certified" Security Professional
By an Amazon.com customer
Official (ISC)2 Guide to the CISSP ExamOfficial (ISC)2 Guide to the CISSP Exam by Susan Hansche CISSP
Buy used from: $24.62
These books and the cccure.org website is all you will need
CISSP All-in-One Exam Guide, Third EditionCISSP All-in-One Exam Guide, Third Edition by Shon Harris
Buy used from: $6.96
These books and the cccure.org website is all you will need
Security+ Certification Training Kit (Pro-Certification)Security+ Certification Training Kit (Pro-Certification) by Microsoft Corporation
Buy used from: $1.86
I failed the first time I took the test after studying the below references, this book covers everything you need to know for the exam. I beat the crap out of the exam after i read this book!
Mike Meyers' Security+ Certification Passport (Passport)Mike Meyers' Security+ Certification Passport (Passport) by Trevor Kay
Buy used from: $0.22
This book is not enough in itself to pass the test but a good reference
ExamWise For Security+ Exam SY0-101 (With Online Exam)ExamWise For Security+ Exam SY0-101 (With Online Exam) by Helen O¿Boyle
Buy new: $30.39 / Used from: $14.99
This is a good book, and if you google it, i think you can get it for free now
Ethical HackingEthical Hacking by EC-Council
Buy used from: $14.94
I took the V2 exam, this was all you needed but now you need some more materials, the EC-Council website says you need more than this book now, just buy their stuff if you have the $$$
CEH: Official Certified Ethical Hacker Review Guide: Exam 312-50CEH: Official Certified Ethical Hacker Review Guide: Exam 312-50 by Kimberly Graves
Buy new: $19.79 / Used from: $13.64
I havent read this yet but heard good things about it
Gray Hat Hacking : The Ethical Hacker's HandbookGray Hat Hacking : The Ethical Hacker's Handbook by Shon Harris
Buy used from: $4.99
This is a great book! Its really the next step after the CEH material.  It also covers some of the material for the new objectives.
Mike Meyers' Network+ Certification PassportMike Meyers' Network+ Certification Passport by Mike Meyers
Buy used from: $0.01
These two books did the trick!
Network+ Certification All-in-One Exam Guide, Third Edition (All-in-One)Network+ Certification All-in-One Exam Guide, Third Edition (All-in-One) by Michael Meyers
Buy used from: $4.04
These two books did the trick!
A+ Certification Training Guide, (Exam 220-301, Exam 220-302) (5th Edition)A+ Certification Training Guide, (Exam 220-301, Exam 220-302) (5th Edition) by Charles J. Brooks
Buy used from: $1.42
This book is outstanding!  Everything you need for the exam
Mike Meyers' A+ Certification Passport, Second Edition (Passport)Mike Meyers' A+ Certification Passport, Second Edition (Passport) by Michael Meyers
Buy used from: $0.32
when i am studying for certifications, I like to have a little book to bring with me places to study.  I used this one.  Not enough depth to be all you need but a good "carry around" book
MCSA/MCSE Self-Paced Training Kit (Exam 70-290): Managing and Maintaining a Microsoft  Windows Server(TM) 2003 EnvironmentMCSA/MCSE Self-Paced Training Kit (Exam 70-290): Managing and Maintaining a Microsoft Windows Server(TM) 2003 Environment by Dan Holme
Buy used from: $10.00
This is all i used to pass the exam, if you actually do the labs and understand the material you should be good to go.  With the test being "hands on" now, you best do the labs!
Linux+ Study Guide, 3rd Edition (XKO-002)Linux+ Study Guide, 3rd Edition (XKO-002) by Roderick W. Smith
Buy new: $31.49 / Used from: $5.57
I am studying for my Linux+ and bought these two books, will come back and edit this after the exam to say if they helped or not
Linux+ 2005 In DepthLinux+ 2005 In Depth by Jason Eckert
Buy new: $26.39 / Used from: $14.05
I am studying for my Linux+ and bought these two books, will come back and edit this after the exam to say if they helped or not