Progressive Duets, Volume 1, by Peter Ilyich Tchaikovsky, Georg Philipp Telemann, Louis Kohler, Johannes Brahms, William Duncombe, Francois Couperin, Jan Ladislav Dussek, Jean Baptiste Duvernoy, Stephen C. Foster, Michel-Joseph Gebauer, Johann Sebastian Bach, George Frideric Handel, and others. Arranged or composed by Larry Clark and Doris Gazda. Easy to medium level.