I used the CySA+ Cert Guide by Troy McMillan. This book gives a pretty good overview of all the material you'll be quizzed on. I'd definitely recommend starting off your studying by giving the book a read through. I didn't get any of the other books so I can't directly compare, but this one in particular covers all the theory needed.
The Cybersecurity Analyst+ content is centered around, you guessed it, knowledge used for cyber security analysts. This certification covers a wide variety of topics such as incident response, the forensic process, business continuity, tool usage, vulnerability management, and compliance. This content and exam is considered intermediate, which Comptia considers a step above entry level. Given that I've been an analyst on some level for several years now, I figured I'd give it a shot!