Security+ Training Guide

in Security+
I have two reading materials: “Security+ Guide to Network Security Fundamentals" (second edition) by Mark Ciampa and “Security+ Training Guide” by Todd King. Mark’s is for my class. Todd’s is given by a teacher, which I do not know much about it, neither hear much about it on this site. My
: : is Todd’s book is worthy to study? (I incline to purchase Security+ Exam Cram 2).
