The Duet Books, written by Dennis Alexander, are coordinated with the Lesson Books. Each primo part stands alone as a solo, and the secondo part is slightly harder and can be played by the teacher, parent or a second student.

By Gayle Kowalchyk, Dennis Alexander, E. L. Lancaster. For Piano. Piano - Alfred's Premier Piano Course. Premier Piano Course. Book and CD. 32 pages. Published by Alfred Publishing.

By Dennis Alexander. For Piano. Piano Method. Alfred's Basic Piano Library. Book. 32 pages. Published by Alfred Publishing.

By Dennis Alexander. For Piano. Piano Method. Alfred's Basic Piano Library. Book. 32 pages. Published by Alfred Publishing.