I enjoyed Michaelides' first book, The Silent Patient, especially the twist where you finally figure out how the two POVs intertwine.
The description of this book draws you in. Mariana knows that Edward Fosca is a murderer, but how will she prove it? It sounds like she will be going into a downward spiral destroying everything in order to get the proof she needs. Also who are the Maidens and why do they adore Fosca so much? It sounds like this book will have a lot of twists and turns and I cannot wait to read it.