I had books from Cybex I think from School, they were so so because they were just soooo darn long and drawn out.
I used Mike Myers passport books to take the test for A+ and Net+ though.
They were cut down alot from the other books I had and a little easier to read and comprehend because it had more of direct info for the test and not so much unneeded historical info.
One thing though is it might be possibly a little scaled down when you go to take the test or quizzers. The test has more support scenarios then anything some cabling stuff.
