Galileo's Daughter, by Dava Sobel, HarperCollins, 1999.
This book is NOT about Galileo's daughter. This book is about Galileo, his writings, his beliefs, his trial, and it includes letters written by his daughter to him. I usually finish a book in a day or two, and this one took me WEEKS to wade through. In fact, I even set it aside during the holidays because it was a bit heavy for that time of the year. I am glad I read it; I feel now I can separate more of the myth from the man when hearing or reading about Galileo, but it definitely is not light reading by any definition.