Where to read about the architecture of the Android system?

Question

Android

I asked myself the question of creating custom firmware for my Android phone. Instructions and various manuals in the spirit of "replace here, delete there, enter such a command" are full, but there is no awareness of what you are doing. From this you have to sort out options, act at random, blindly.
I would like to systematize information about the architecture of the system in the form of a book or an online resource, where it would be dismantled what, where and how. Preferably in Russian. Like here for example

Answer 1

I found this book
By Karim Yaghmour
I think it is

Answer 2

Best online resource - developer.android.com
Best book - commonsware.com/Android