Percussionist Thomas Siwe organizes and analyzes the groundbreaking musical literature that arose during the twentieth century. Focusing on innovations in style and the evolution of the percussion ensemble, Siwe offers a historical overview that connects the music to scoring techniques, new instrumentation and evolving technologies as well as world events. Discussions of representative pieces by seminal composers examines the resources a work requires, its construction, and how it relates to other styles that developed during the same period. In addition, Siwe details the form and purpose of many of the compositions while providing background information on noteworthy artists. Each chapter is supported with musical examples and concludes with a short list of related works specifically designed to steer musicians and instructors alike toward profitable explorations of composers, styles, and eras.