I've written a book! It covers ASM programming on Z80, 6502, 68000, 8086 and ARM!
It's available on amazon stores worldwide!
"Learn Multiplatform Assembly Programming... With Chibiakumas" is my first book... Covering a whopping 5 CPU's (Z80, 6502, 68000, 8086, ARM) it's aimed at the absolute beginner.
There's an introduction covering the terminology you'll come across, an introduction to each processor, it's registers and addressing modes, and a summary of all the major commands, written in a style intended to be 'down to earth' and more suited to regular readers!
The book contains 270 pages is available now from Amazon stores worldwide either in print as a paperback ($18.66 / £14.95), or digitally on Kindle ($9.55 / £7.99). (Though there seems to be some 'shipping issues on the UK store - I had to buy mine to Japan from the US)
Take a look below if you're interested:
https://www.amazon.com/dp/B08W7DWZB3