I didn't find a lot of things to discuss from the book, but the notion of free will (and how the author deals with it) is kind of interesting.
On page 46, "Things happen the way they happened, once and only once. I'm not a proponent of splitting universes."
On page 57, "There is only free will when you are in time, in the present."
On Page 76, Henry and Clare discuss some different possibilities:
Determinism or block universe: Past, present, and future all coexist simultaneously and everything has already happened.
Choas: Anything can happen and nothing can be predicted because we can't know all the variables.
Christian Universe: God made everything and it's all here for a purpose, but we have free will.
"Work like you don't need the money. Love like you've never been hurt. Dance like nobody is watching." -- Keller Williams