E. L. Lancaster is an American pianist, music educator, and author in the field of piano pedagogy. He has an extensive background in teaching piano, piano pedagogy, and music education. Lancaster has written numerous piano method books, sheet music, and educational materials that are widely used by piano instructors and students. He is particularly known for his contributions to the Alfred's Basic Piano Library series, which he co-authored with Morton Manus and Amanda Vick Lethco. His educational materials often focus on systematically building skills for beginning and intermediate piano students. Lancaster's work in piano education has made a significant impact on how piano is taught and learned across various levels of instruction.