I've always been too terrified to look at Peter Wimsey fanfiction, but I'm so glad I was brave ;)

This was lovely. Warm in tone and pitch-perfect dialogue.

He gave an odd, hesitant half-shrug. "I trust you with my books."
This is so much like the conversations they have in the books. They're both exactly them, and the long, languid description at the beginning is very much like Sayers. Oh, and I loved the quotes. You can't write Peter and Harriet without them!

Bravo! This was great.