One idea for a good gift would be a nice book. There are more books about fly fishing than any other sport. So, where to begin? One place to find an interesting read would be The Whitefish Press. They have a lot of books, many that focus on the history of angling. Plus, you're not likely to find the titles they sell in many places. Take a look at their catalog & I'll bet you can find a book any angler would enjoy.
One of my favorites is the book, "Forgotten Fly Rods". It introduces us to some of the best rod makers who have been lost to history. A well written & interesting book, I think just about any angler who likes history would enjoy this one.