It sounds like you're referring to the popular piano method book (likely by Éditions Hervé or similar French publishers), and you’re asking about an interesting feature of its PDF version.
of the PDF for this book (if you have a legal, scanned, or digital edition) is often that the page turns are perfectly matched to avoid interrupting the student's reading flow — but more notably, many PDFs of this series include embedded, clickable indexes that let you jump directly to any classical theme (like Ode to Joy , Clair de Lune excerpt, or Minuet in G ). les classiques favoris du piano 1a pdf
However, there's a : This specific book (Volume 1A) is still under copyright in most countries (France, EU, etc.). Therefore, a free, public PDF is unlikely to be legal . If you found one online, it’s probably an unauthorized scan. The interesting "feature" of such scans is that they often have missing pages, skewed images, or incorrect fingerings compared to the original printed edition. It sounds like you're referring to the popular
Here’s the key point: