The Mike Meyers book is $37USD. That's what I'm using.
I did however get the Network+ without using a physical book though.
We missed getting the AIO Sec+ title so wrote in a different series, also with McGraw-Hill:
Hmm,
No, Gibsons is super cheap , like 9 bucks for kindle version,
Hey Man,
I am currently circling back into studying for the Sec+ exam and so far I have:
There are plenty of free resources out there too - I do prefer having a hard copy of meaty material which is why I got the Mike Meyers book. I also have Udemy which has some courses but I can only sit/listen/watch on this type of material for so long lol. We will see how it goes! I hope this helps!