Best materials to learn about note investing

[Charley Gates]

Hello!  

I am a buy-and-hold investor who is learning more about investing in notes.  I am interested in recommendations for online courses or books (or other sources of information) that people have found useful. 

I understand that notes is a business best learned by doing, but I am trying to lay a good foundation of knowledge as a starting point.

To date, I have read these books:

"Invest like a Bank" by Beaux Blast

" Little Green Book of Note Investing" by Fred Moskowitz

"Real Estate Note Investing" by Dave Van Horn

"Note Investing Made Easier" by Martin Saenz

"Invest in Debt" by Jimmy Napier

"Profiting from Non-performing Mortgage Notes" by Amed Hazel

I welcome any thoughts or recommendations that the group may have.   Thank you in advance. 

Best regards,

Charley