The following pdf files contain the documents mentioned in the book: “Mastering the Nikon D610”

Ch 1: Initial Hardware Considerations
Ch 2: PictBridge Printing with the Nikon D610
Ch 5: Eye-Fi Card Information
Ch 5: Nikon D610 Firmware Upgrade
Ch 6: Streaming Uncompressed HDMI Video from Your Nikon D610
Ch 13:Selecting a Nikon Speedlight Flash Unit
Errata in Mastering the Nikon D610
Camera Control Reference for Nikon D610