Instruct: Classify a given review into positive or negative sentiment.
Query: one of my favorite series

I love all the Patrick O'Brian novels, the whole series, what is it 23 books? They are great adventure, fabulous characters, based on real historic naval battles. I really like how they portray male friendships as loyal and kind, in the midst of scary battles and espionage in the era of Napoleon. My only complaint is that O'Brian died before finishing the series...