Happy practicing. Aim for beauty, not just speed.
Do not play the entire etude. Play Bar 1. Perfect it. Then Bar 2. Perfect it. Then put Bar 1 and Bar 2 together. This is especially critical for etudes like #12 (6/8 with cross-rhythms).
Your endurance, articulation, and musicality will thank you in one month.
The book's longevity—spanning over half a century—is attributed to its unique structural logic:
