An excellent book, very good value, very clear ... useful (in my case) to reassure about the difference with the previous versions. 573 pages with lots of screen prints. Although much for people who do not know Windows at all, only for people with experience from other versions. (Incidentally, despite all that is said in, Windows 8 looks pretty good ... and not too complicated). Small precision (at 01.27.13): Windows Defender Windows 8 contains a virus. Previous versions, no, but now yes. Do not activate if another antivirus installed. (So to correct page 505).