I am looking for a book series that upon completion will leave a feeling of emptiness, as if I'm saying goodbye to a good old friend, when you realize the good old days were left behind. It's a shitty feeling that only comes after something great, something that left a mark on you.
Patrick O'Brian's Aubrey & Maturin series is the first that comes to mind for this feeling.
Thanks for the recommendation, I'll look it up.