Suggestion for the Book(s), mostly nitpicking.

[GeoSn0w]

This is a very minor thing and I am mostly nitpicking at this point, but when you write "Xcode" you tend to use both "XCode" and "Xcode". The official name is "Xcode", not "XCode" so it'd be a good idea to keep it consistent, either one form or the other An example of both of them being used a few words apart is in Volume I, page 20, the third paragraph.

"The core of the simulator is just that: A component of Xcode's CoreSimulator private framework, which starts the com.apple.CoreSimulator.CoreSimulatorService XPC service. The framework also depends on SimulatorKit (another XCode private framework)."

Book version: v1.1

[morpheus]

Sustained. Quickly fixed with

:1,$s/XCode/Xcode/g