Not all of us have the book. If you provide more details you would have a better chance of getting an answer.
However, with regards to the types of feedback you mention.
P the feedback error signal is proportional to the output
PI there are two components to the feedback; one is proportional to the error the other is a function of the magnitude and duration of the error (i.e. proportional to the integral of the error).
PID there are three components to the feedback; one is proportional to the error the other is a function of the magnitude and duration of the error (i.e. proportional to the integral of the error) and the other is proportional to the rate of change of the error (i.e. proportional to the derivative of the output).
A simple amplifier in the feedback loop, with only resistors, produces a proportional error signal
An amplifier with a capacitor from its output to input is an integrator, producing an integral error signal
An amplifier with resistor from output to input and capacitor in series with its input produces a derivative error signal.
Hope some of that helps.
Regards,
Frank