Second paragraph of third chapter:

The boy with grey eyes. A planet, viewed from space, imploding. A gaunt woman wrapping her arms around Asha’s middle and whispering sister.

Big chunky queer time-travel Regency romance crossover space opera; what’s not to love? I confess that I got this purely because I enjoyed the author’s novelisation of The Church on Ruby Road, and basically this has everything you would expect, dynastic manoeuvrings and far future warfare. I get a lot of books like this, and often I don’t last past the first fifty pages, but I kept going with this one to the end and it was satisfying. You can get The Principle of Moments here.

This was my top unread book by a writer of colour. Next on that pile is The House of Doors by Tan Twan Eng.