Don't get Mike's book! Get the one by Quentin Docter and Jon Buhagiar. By purchasing the physical book you're able to a copy of the ebook in pdf and epub format. You also get access to the Wiley Efficient Learning with the 1101 and 1102 flashcards, practice questions, and practice exams. The app is phenomenal if you look into it.
They also offer a hardcover version for more money but you get 1102 labs included. I highly recommend that one since you get everything mentioned above plus the 1102 labs.
https://www.amazon.com/CompTIA-Complete-Study-Guide-220-1101/dp/1119862914
https://www.amazon.ca/CompTIA-Complete-Study-Guide-220-1101/dp/1119862914 try this book.
I also suggest watching NetworkChuck on YouTube or CBT Nuggets, heck even old Techquickie videos are still mostly relevant for the basics and foundations. NetworkChuck and CBT are more for Cisco proprietary hardware rather than general Net+ but the basic concepts of how network function is the same.
If anyone has any other suggestions, that would help.
I ended up ordering this one
https://www.amazon.com/dp/1119862914?ref_=cm_sw_r_apin_dp_PK598WDRXH0D45A3KBDN
Someone from another sub recommended that one.
Sybex or All-in-One are the only 2 I ever recommend
I would say only using 1 resource to study for an exam is a bad idea: better to use at least 2
So supplement Messer with something else and you'll be on the right path