This is from "Mike Meyers' CompTIA Security+ Certification Guide, Second Edition (Exam SY0-501), 2nd Edition"
(Amazon link: https://www.amazon.com/Meyers-CompTIA-Security-Certification-SY0-501/dp/126002637X)
It's on page 459.
I recently passed Sec+ with about a week of full-time study, but I was already familiar with some of the material from being a computer enthusiast and having my A+ cert. It's not an advanced level certificate and it's probably the simplest security-specific certification, but it's not easy.
I think 60 days is more than reasonable if you really commit to studying like it's a job. 3 hours on work days and 8-10 hours on your days off. Use a few different resources to hit the material from different angles and see different examples of how the questions may be worded. You'll be overprepared and have no problem on test day.
I found these resources helpful:
Practice Exams -- I see a lot of bad reviews about the bundled cd-rom, but I only had the book which I thought was great. If you can find the book by itself on ebay or something that would probably be the best value
Professor Messer's YouTube playlist -- he also hosts study groups that you can find on his channel.
https://www.amazon.com/Meyers-CompTIA-Security-Certification-SY0-501/dp/126002637X
It has him listed as an Author. He's just not the author of the "All In One" Security+ like he is for A+ and Net+