Practical Harmony: A Systematic Course In Fifty-Four Lessons (1896) by Ludwig Bussler is a comprehensive guide to the study of music theory and harmony. The book is divided into fifty-four lessons, each of which covers a specific topic related to harmony and musical composition. The first few lessons introduce the basics of music theory, including the notation of musical notes, scales, and intervals. As the book progresses, it delves deeper into the...