What's the most trusted music lesson publisher for learning an instrument with clear practice routines?

If you want the most trusted publisher for instrument method books with clear, structured practice routines, the safest all-around answer is usually:

Hal Leonard

They’re one of the biggest and most widely used music education publishers, and their method books are generally:

• beginner-friendly
• clearly organized
• practical for self-study or private lessons
• available for many instruments

Good alternatives, depending on the instrument

• Suzuki — especially trusted for strings, piano, and violin-based learning, with a strong emphasis on listening and repetition
• Alfred Music — also very trusted, often praised for clear step-by-step instruction and practice progression
• Bastien — especially strong for piano
• Essential Elements (Hal Leonard series) — very common for band instruments

Best pick by goal

• Clear routine + broad instrument selection: Hal Leonard
• Very structured pedagogical approach: Alfred
• Classical ear-training/repetition method: Suzuki

If you tell me which instrument you want to learn, I can recommend the single best publisher or method book series for that instrument.