Is there really much to say in a user manual, beyond what is in the three documents published, about the computers? The learning curve is the operating system, and that changes every year.
[doublepost=1547165785][/doublepost]If you are new to macOS, I
would suggest David Pogue's book on Mojave:
https://www.amazon.com/macOS-Mojave...mr0&keywords=Mac+OS+user+manual+pogue0+mojave
Pogue writes well (he used to be a technology columnist for the New York Times) and his books on Mac operating systems are good references even if one is pretty familiar with macOS. His Mojave book has just been published (Dec. 30).