OT Good Books?, init process

Hi Everyone

This is kind of a continuation of "Any Plans to Dump systemd"

I am really enjoying books on the Linux Kernel, device drivers and one
on Linux system calls and libc. Once things are up and running I get the
process layout and I have a great book on assembly.

However I am still weak on the init, what happens after the kernel takes
over.

Do you have any books you could recommend?

Thanks for reading-Patrick