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!
For those looking to purchase a high-quality physical copy, retailers like Amazon and specialized music stores like Woodbrass carry the official Van de Velde editions. Essor Piano | PDF - Scribd essor piano pdf
If you are looking for the official "proper" content in PDF format, it is commonly hosted on educational and sheet music platforms: Educational Blogs: Sites like Hai2Hai Blog If you have the PDF, try this tip