Which manual to buy?

[Old Shas]

The Operator's Manual for my Ford 1920 has taught me a lot, but I need more.
I see Service manuals, Shop manuals, and Parts manuals for sale;
the descriptions posted by the vendors are often similar and sometimes identical!
"... covers the removal, testing, overhaul, and assembly of components..."

Any clarification would be gratefully received!

 

[the old grind]

This guy covers a lot, and thoroughly, specs, tests, overhauls, etc. There isn't much left out.

Amazon.com

Amazon.com

 

[CoyPatton]

I can’t say about your 2920 specifically, but generally there is some overlap between manuals but each provides information not in the others.

You say you need more than the owners manual, but not what info you need.
Specifics always allow for better responses to your present needs.

Long term you want all the manuals, short term depends on your present needs.