I bought a resonator guitar,then I needed to get into alternative tunings and open keys,learn how to waggle that piece of glass or metal up the frets without making scratchy sounds and learn to play the blues.Well from Amazon I got this book/CD,money very well spent,very well taught very clear and at a pace you can easily keep up with or go over and over until you've got it right.The best thing is you very quickly start making sounds that sound like they should if you follow closely the directions given.The CD shows you what it should sound like and develops gently challenging you until you see clearly just how you've improved from chapter 1.It includes tuning(vitally important this) how to hold a bottlenesk slide,how to avoid those scratchy sounds
and see how it develops as you work at it.Like any guide you need to work at it daily,practise and it works.I teach guitar as well and if all tutors were this clear,this well laid out and developed technique this clearly for regular tuned guitar playing my job would be a lot easier.
Highly recommended for any or everyone exploring slide guitar techniques and getting into playing quickly.