I know it gets a lot of hate, but TNG: Masks. There's no adversary, just the crew working together to solve a problem. The solution is based in understanding. For similar reasons, I like Cause and Effect and Time Squared.
I'm reading The Anglo-Saxons by Marc Morris. It's non-fiction. Morris' books have a good narrative, but they are scholarly works. I haven't gotten very far into The Anglo-Saxons yet, but one bit I greatly enjoyed was the author drawing parallels between Beowulf and Tolkien's Rohirrim, all while discussing the archaeological evidence for feasting halls and the zeitgeist of the people who'd built those halls.
Apropos of this episode:
I'm all alone, more or less