This book has a lot of hype and I am here to tell you it is all thoroughly deserved. I knew I was going to give this 5 stars within the first 50 pages and I am trying to be more stingy with that rating. The main plot engine here is an Agatha Christie style locked room mystery, set against a wider backdrop of impending doom. The world building is top notch with the author not showing their hand too much with the wider plot. What makes this book sparkle are the characters. Jagged, little diamonds of characters that drag you in and make you want to know more. You will laugh, gasp and feel sorrow with these characters. A definite recommend and I hope the high standard is kept on the next one which has already been pre-ordered.