This book hard to classify, but I wouldn't call it a thriller. It's more of a psychological mystery. I love the premise. The main character, Ess, wakes up on a sailboat, alone, and has no idea who she is. Her efforts to reveal her identity, layer after layer, are compelling. It's more of a slow burn than I would like, but it maintains its mystery and intrigue throughout.

The author's knowledge of sailing is obvious, and some of the best parts of the book are when Ess is re-learning how to sail and fighting the ocean alone on her boat.

I think adding more "thriller" elements would have improved the book overall.

I received a free copy of this book from the publisher via Netgalley. My review is voluntary and the opinions expressed are my own.