James McCalla 
Twentieth-Century Chamber Music [PDF ebook] 

20th-Century Chamber Music features an introduction giving a chronological overview of 20th-century chamber music and the major composers in the style, setting in context the following chapters that cover a wide selection of chamber works grouped thematically, including program music; vocal chamber music; works for new ensembles; the modern sonata; and contemporary string quartets. Composers covered range from Schoenberg and Bartók to Toru Takemitsu and George Crumb. The book is ideal for a course focussing on the history of chamber music or a unit in a 20th-century music on the chamber works of the era. Plus, students and scholars will find it an excellent resource summarizing current research.