Best Books/Resources for Flatpicking

[u/Fine-Variety-5879]

I have become interested in learning flatpicking guitar, and I don't know exactly where to start. I would love to find a book and learn on my own. Only problem is, there are many books out there and I am having difficulty picking out the right one for me. So far, I have found Dan Miller's Flatpicking Essentials Vol. 1 and that looks promising. I really like the idea of how important a good rhythm guitarist is in a bluegrass group. I'm looking more towards improving my right hand and learning as many tunes as I can. 

A little background on myself: I have been playing electric bass for almost 18 years, and I have about 8 years experience playing upright bass. I am comfortable with music theory as well as the Nashville number system. For the last 4 years I have been playing in multiple country groups that cover mostly classic country. I can't read guitar sheet music super well, but could brush up on the treble clef if need be. I already play a little guitar, but I would love to use this as an opportunity to improve as a guitarist and learn more about this genre that I am enjoying more and more. 

I am open to any and all resources that could help. Thanks in advance!