A 262-page full color book covering everything having to do with Nikon Speedlight flash units. Covered in this book are the Nikon SB-600, SB-800, SB-900 and R1C1 flash units. If you have been wanting to take a class on using your DSLR with a Nikon Speedlight pick up on this book. Many detailed info backed up by extensive photos throughout the book. The book measures 6"x9" in size. It was printed in 2013.