The new 758-page Nikon Z9 Experience Guide by Douglas Klostermann is updated with all the latest additions and changes for firmware version 5.0 and is now available on Amazon (the book also includes a link to the free Nikon Z9 Menu Setup Spreadsheet):
More Nikon books can be found here.
Additional information:
Fully Updated for Firmware 5
Take control of your Z9, with this comprehensive and user-friendly Nikon Z9 guide book, from the author of over twenty top-rated Nikon user guides since 2012.
Nikon Z 9 Experience helps you learn the features, settings, and controls of the powerful professional Nikon Z9 mirrorless camera. Most importantly, it also explains how, when, and why to use the features, settings, and controls in your photography. The book includes a Z9 Menu Setup Spreadsheet to help you set up the multitude of menu settings.
Like all Full Stop guides, this book is written in a clear, concise, and comprehensive manner to help you learn to use your Z 9 quickly and competently.