The Instrumental Duet Series Worship Suite books feature volumes organized into three 3-song thematic medleys. Each song has an ending, so that they may be presented individually, or as two- or three-song medleys. The piano is an equal musical partner with the instrument in these arrangements. A companion split-channel CD is available with the book/CD packs, and can be useful as a helpful practice aid, providing the instrumentalist or piano player a “virtual practice partner.” The instrumentalist may also perform with the piano trax if no accompanist is available.