this book is a complement to the book received with the device. They complement and satisfy me. I recommend it; small investment that has utility for amateur SLR digital-but very good user of the film. A photo safari in Kenya-Tanzania forced me to invest in an SLR; and my experience has taught me that we must be humble and accept to start again on new bases. I spell a compact, after 15 intense days, I am happy with my results; and thanks, entr others in this book very well.