Galileo's Dream

Quite an unusual story, from Kim Stanley Robinson, author of the Mars Trilogy.  Well, two stories: one is the life of Galileo in Italy and the second is set in about the year 3000 on the planets of Jupiter.  Humans who have settled the planets have a way to time travel and, and for reasons never made completely convincing, they retrieve Galileo from time to time, to help settle some ongoing disputes.  The second of these narratives is a little loopy, but interesting.  Without serious spoilers, it's fair to reveal that the crux of some of the major dispute is whether Galileo is spared or martyred  for his heretical views.  A brief but terrifying part of the book allows Galileo and the reader) to visualize/experience being burned at the stake.  The main narrative describes  Galileo's life, vigorously portraying his vitality, his passion for experimentation, his astonishing breadth of interests and achievements, and his loving but tragic relationships with his daughters.  Not a perfect book, but a wonderful, absorbing read.