I do tech support for a living, so I've read lots of A+ books. This has got to be the worst of the bunch... it has nothing in common with the excellent A+ Exam Cram, except for a few republished questions. The book contains several errors (both factual and typographical), as does the CD-ROM. Some of the practice questions have little or nothing to do with their supposed subject matter - there's a question about printer corona wires on the DOS/Windows exam, for example; many others are horribly worded, ambiguous, or simply irrelevant (CompTIA does not care how many icons are in the Control Panel - they want to make sure you know what they do).With quality practice tests available free for download, why pay good money for four inaccurate ones? Buy the A+ Exam Cram and the Audio Review (neither by Michael Pastore) and you'll do fine on the exam. Leave this to rot next to "Build your own 286" in the Amazon warehouse.