The Nikon D7100 is an extraordinary beast but requires some time learning ... and nothing says that all possibilities have been reviewed. For m 'will best prepare, besides the D7100 for Dummies, I have taken the Max 7100 of B.Rome (which I regularly visit the website!) and I never separate myself from the Usage Instructions original Nikon. It's been a little Pensum but it's the price to pay for happiness !!!