Micro Études (Studies and Etudes) by Elisabeth Parry, Piano Accompaniments by John Alley, Published by  Aurea Capra Editions

Make daily technique practice a pleasure– not a chore. Micro Études covers all the main elements of good technique, through short, melodic, and highly focused miniature studies in keys up to four sharps and flats.  Micro Études aims to make practice enjoyable and so increase motivation. Every micro-étude, in every key, and at every tempo option, has a free downloadable piano accompaniment to make practice a truly musical experience. The principles of Micro Études are based on research into proven strategies for progress through successful practice. A detailed introduction provides guidance on how to use the book effectively.