Reading this a second time, I liked it more; I think my theory the first time I read it that it’d lost some of its freshness because I’d been reading too many Phryne books in a row was probably true. It gives us a glimpse of a different Phryne, and the experiences that made her the person she was, covering her life in Paris just after the war, and that’s pretty interesting — you can see it informing the way she chooses her lovers in the present-day of the books, and how she really became tough as nails.
It’s also nice because the book gives us a little more focus on Bert and Cec — a little more of a glimpse at their history and their bond, and some of their friends.
Against that, the plot with the girl who was going to marry a chef feels very light, almost inconsequential. It does help keep the book moving along when there’s a lot of other emotions that could make it heavy-going, but it’s not memorable or especially interesting in itself.