Lemmon (1786 ~ 1854), a famous French music publisher, is also an excellent piano teacher and composer. As a successful publisher, he published many works of famous composers at that time, such as Chopin's Piano Teacher. He founded a systematic and scientific piano teacher system and applied it to teaching practice.

Lemmon piano etude (Op.37) is an advanced piano practice textbook specially written by Lemmon for children, which consists of 50 etudes with different lengths. This textbook has been widely circulated since its publication and is also widely used in piano teaching in China.

Lemmon's piano etudes are between "599" and "849" by Cherny, which is a suitable teaching material that can connect the preceding with the following. Compared with "599", this textbook requires higher technical level and expressive force of music.

In the arrangement of piano teaching progress, this textbook can be used as an auxiliary textbook for Cherny's "849" etudes, and can also be used as an independent textbook.