First of all, the books and training material for the Network+ exam I used was the Network+ certification study guide second edition by syngress and osborne. I also picked up another Network+ book to read as a cross-reference but this was my main book.
However, when I studied (took me a few months as I am home schooling), when I was ready to write the exam after last minute studying, I found out when I wrote the exam that all that was studied was only information.
You had to apply all the knowledge from these books. Only about 5% of the question pertained to information taken from textbooks. The rest were real life scenarios.
The good news is that if you pick up this book (just make sure that it says Comptia quality material. You can use this book or another, but make sure to get at least two books and read them)
If you take your time and know your material you will pass your exam. I got a 768.