Dave Krehbiel's fast-moving memoir, Through the Door: A Horn-Player's Journey, relates the adventures of a young musician who uses his musical talents to cover up his scholastic shortcomings. In so doing, he finds himself, miraculously, in the career of his dreams-playing principal horn for Chicago, Detroit, and San Francisco symphony orchestras.When the door opens for him, he finds himself in his first job, playing assistant principal horn for the Chicago Symphony Orchest...