I'm still slowly working my way through the books. While I really enjoyed 'The Book and the Sword' the story I remember the best is 'Ode to Gallantry'. It was just so funny and over-the-top! (Was it supposed to be?).
I suspect 'Fox Volant' was probably very clever in the original, but it lost a lot in the translation I read. I could still appreciate the artful plot structure, though.
I reserve the right to change my mind as I read more!