Learn Hawaiian Slack String

[OpenG]

I'm searching for printed information/content about learning Hawaiian Slack String music -- from absolute basics through intermediate level. Obviously I've looked here on the TG site but didn't find exactly what I needed. Can someone point me to books or tab or other printed material that you believe useful? Thanks for any leads!

[Strumbanjo]

Have you looked at the material at Melbay?

https://www.melbay.com/Products/Categor ... k-key.aspx

[OpenG]

Thanks, yes. I have Mark Nelson's video lessons too.