The book "Time is Merciless" by Jennifer Egan

Jennifer Egan's 13 chapters of "Time is Merciless" are separate stories, but they are intertwined around common characters. It is a novel about love, regret, music, the transience of life, and the relentless march of time. The novel won the Pulitzer Prize "for its innovative exploration of themes of coming of age and aging in an age of digital technology and rapidly changing culture."