I recently purchased Rick Williams' book, JAM TUNES for Bluegrass Mandolin. Compared to other courses/books, this one targets a learning segment that has been lacking for some bluegrass players. Esp. the Intermediate Player. The material is easy to understand, comprehend and digest. These songs are definately going to add to your learning experiences. His presentation and choice of songs, new or old are excellent for someone like me. It separates the learning process into three distinct phases so easily you cannot help but learn his music. Take a trip to his website for some great samples from this resource for mandolin bluegrass. http://www.bluegrassbooksonline.com or contact him at Rick@bluegrassbooksonline.com. If you are willing to learn bluegrass music using this method you will not be disappointed.