Norman Maclean's A River Runs Through It and Other Stories. Not just for the fishing, which would be nice, but for the general philosophy of the characters and the lifestyle of early 1900's Montana. The book and movie were both good, but the book was better. It has one of my favorite quotes,

“Eventually, all things merge into one, and a river runs through it. The river was cut by the world's great flood and runs over rocks from the basement of time. On some of the rocks are timeless raindrops. Under the rocks are the words, and some of the words are theirs.
I am haunted by waters.”