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