This project examines over 40 publications consisting of published warm-ups, routines, and materials suitable for daily routines. The books were all written specifically for the horn and published between 1940 and 2015. They are split into periods of twenty years each during this timeframe: 1940-1959, 1960-1979, 1980-1999, and 2000-2015. Included are brief annotations for each of the books which consist of general biographical information on the author, a summary of the material presented in each routine including a breakdown of how much each author covers a set of defined components, and suggestions for which type of student would be best to utilize each routine through an assessment of its strengths. Trends are also examined within each time period that attempt to demonstrate the larger evolution within the project over the course of the entire 75-year period.