any suggestions about books to learn fingerpickin' style?
more in the way to blues and sliding with open tunings
Have a look at the Homespun offerings. I fingerpick blues, and also play slide in open tunings. I learned a lot from Rory Block's Homespun vids with tab book - they're probably downloads now - and Mark Hanson, also on Homespun, has a very good reputation for beginner-level fingerpicked blues.