Few pianists can claim such an extraordinary career and life as Ruth Slenczynska. She began performing in public at the age of four, and, 92 years later, she is still playing. She studied with some of the 20th century's greatest pianists including Rachmaninoff, performed for Presidents Kennedy, Carter, and Reagan as well as Michelle Obama, and even played a duet with President Truman. For her new retrospective, Slenczynska has chosen some of her favorite,...