A+ : Computer and Security

ISBN	Name	Publishing Year	Taste it!	Buy
9781118324080	CompTIA A+ Complete Study Guide Authorized Courseware: Exams 220–801 and 220–802	2012	Sample	Get it!
0	Lynda - CompTIA Security Exam Prep SY0 401 Part 1 Network Security	2016	Sample	Get it!
9780071848220	CompTIA Network+ All-In-One Exam Guide, Sixth Edition (Exam N10-006)	2015	Sample	Get it!
9781118875070	CompTIA Security+ Study Guide SY0-401, 6E	2014	Sample	Get it!

To read the sample without any problem, I will suggest you to use Google Chrome. You must also have PDF and EPub reader. Happy Browsing!