Digital versions (PDFs) of L'Essor are frequently sought by students and teachers for tablet use or quick reference.
If you have the PDF, try this tip from the text: Focus on the lift of the finger rather than the strike. It changes everything! essor piano pdf
If you are looking for a "pdf" version of this method, several digital repositories host scans or digital editions of these works: Digital versions (PDFs) of L'Essor are frequently sought