Instruct: Classify a given review as either positive or negative.
Query: The punchline makes it work!

Yes, this is a biography of Galileo, not his daughter, as many people have pointed out. And yet . . .Because it is a biography of the human being, and not just the scientist, the insights into his life that we get by reading his daughter's letters to him make him vastly more real (and more vulnerable) than he would otherwise be to us.His daughter was an integral, if sometimes distant, part of his life. That's why the surprise ending is both wonderfully appropriate and moving. [And, no, I'm not going to give it away.] Trust me on this: the book is well worth reading.