I recently purchased a used Concertina in a Charity shop in England last week. I have always wanted to learn to play one. I know absolutely nothing about them - this one is a 20 button one, with an extra button for releasing the air, I'm assuming. on the right thumb side. The markings on the side say Rosetti Rambler Foreign and made in Germany on the other side. Does anyone have any knowledge or information about this and any suggestions as to how to start learning....for example any book I should purchase to begin learning. I have taken several years of piano lessons (however, that was quite a while ago as a child), so I do have some litmited music background. Also, now that I'm back home in Ohio are there any clubs or groups that meet to play and discuss the concertina? Any information would be greatly appreciated.