Amazon.com has no review or "look inside" feature for these books. I found the table of contents from the
publisher's site. I am afraid that the book may not cover recent composers enough because its range is quite wide, actually starting from the beginning of 20th century. The only names new to me are Still, Oliveros, Davidovsky and Chen Yi. (I wish more not-well-know, recent composers were included.)
MUSIC IN THE TWENTIETH AND TWENTY-FIRST CENTURIES
1. Introduction: A Sense of Possibility
Part I: From the Turn of the Century to the First World War
2. Expanding Musical Worlds at the Turn of the Twentieth Century
3. Making New Musical Languages
4. Folk Sources, the Primitive, and the Search for Authenticity
Part II: The Interwar Years
5. New Music Taking Flight after World War I
6. Paris, Neo-Classicism, and the Art of the Everyday
7. The Search for Order and Balance
8. Inventing Traditions
Part III: The Second World War and Its Aftermath
9. Rebuilding amid the Ruins
10. Electronic Music from Magnetic Tape to the Internet
11. Trajectories of Order and Chance
Part IV: From the 1960s to the Present
12. Texture, Groups, Loops, and Layers
13. Histories Recollected and Remade
14. Minimalism and its Repercussions
15. Border Crossings
ANTHOLOGY CONTENTS
1. Gustav Mahler, Symphony No. 3, fourth movement
2. Claude Debussy, Estampes, Pagodes
3. Arnold Schoenberg, Pierrot lunaire, No. 1, Mondestrunken
4. Alban Berg, Wozzeck, Act 3, Scene 3
5. Charles Ives, Symphony No. 4, first movement
6. Igor Stravinsky, The Rite of Spring, Introduction
7. Kurt Weill, Lindbergh’s Flight, Introduction of the Pilot
8. Igor Stravinsky, Symphony of Psalms, second movement
9. Maurice Ravel, Piano Concerto in G, first movement
10. Arnold Schoenberg, Piece for Piano, Op. 33a
11. Anton Webern, Symphony Op. 21, second movement
12. Béla Bartók, Music for Strings, Percussion, and Celeste, first movement
13. Aaron Copland, Billy the Kid, “Street in a Frontier Town”
14. William Grant Still, Africa, second movement, Land of Romance
15. Benjamin Britten, War Requiem, Requiem aeternam
16. Dmitri Shostakovich, String Quartet No. 8, third movement
17. Pierre Boulez, Le Marteau sans Maitre, No. 5, Bel Édifice Et Les Pressentiments
18. Pauline Oliveros, Traveling Companions
19. Mario Davidovsky, Synchronisms No. 6 for Piano and Electronic Sounds (1970), excerpt
20. Kaija Saariaho, Noa Noa
21. György Ligeti, Continuum for Harpsichord
22. Elliott Carter, String Quartet No. 5: Introduction, Giocoso, Interlude, first movement
23. George Crumb, Vox Balanae, excerpt
24. Chen Yi, Ba Ban
25. Steve Reich, Violin Phase
26. John Adams, Doctor Atomic, Act 1, Scene 3, “Batter My Heart”