Started on a re-read of Victoria Goddard's Greenwing and Dart series with "Stargazy Pie".
A complicated world set up with multiple worlds magically linked. Set after "the Fall" when magic went bonkers and a lot of things were damaged, or just stopped working. A roughly 18th century society in a market town, but with extra awareness of technological possibilities (used to have magical water systems in houses, had to replace with technology). Young gentleman has returned home after University. Some years previously his war hero father was declared a traitor, young gentleman is getting at best a mixed reception, not helped by him taking a job as an assistant in a bookshop which is most definitely not the job for a gentleman. Main theme is a mystery novel, trying to work out why strange things are happening in the very staid market town. Other themes are finding yourself and recovering from a seriously awful experience (before the book started). Also very much about friendship (as are many of Goddard's books).
I do like Goddard's work - she interlinks the different series she has written across her worlds and you get more depth to the world from that. I am fond of re-reading and her books work very well on that for me - there are things to be gained on re-reading a book when you have read one of her other books.