This album compiles the 20 études for solo piano composed by Philip Glass between 1994 and 2012. It was released in 2019 by Orange Mountain Music as a comprehensive edition of his piano work.
The études were originally written as exercises for Glass himself, but later became concert pieces performed by pianists such as Maki Namekawa and Bruce Brubaker. The album features performances by the composer himself.
The collection spans from Étude No. 1, composed in 1994, to Étude No. 20, completed in 2012. Glass describes them as an exploration of piano technique within his characteristic minimalist style.