Here’s a short extract:
OMN: How does the title of The False Prince relate to the story?
SM: The idea of “falsity”, betrayal, masks, secrets, are at the heart of the book. People pretending to be who they’re not. Enigmas hidden in plain sight. Hope placed in the wrong people. But also, it’s a reference back both to Russian history, and to something in the first Trinity book, The Koldun Code. Don’t want to say any more for fear of spoilers!
You can read the whole interview here.