we used
this, but it does miss a lot of information, for example, in a near 3 inch thick book, both overclocking and watercooling make up about 1 sentence, and SLI/Crossfire are about a paragraph (while those aren't really A+ areas, the amount of information that goes along with most enthusiast stuff is staggering, probably more than general A+)
i took a class at a local tech school, and got tuition paid for by government aid (pell grants), but i also do tons of reading and research on my own, and i've also been building computers since i was a kid
what i would say the most annoying thing about A+ is that often there are multiple right answers, but only one correct answer, and 9/10 times, the correct answer is stupid