The body you are wearing used to be mine.

Myfanwy Thomas awakens in a London park surrounded by dead bodies. With her memory gone, she must trust the instructions left by her former in order to survive. She quickly learns that she is a Rook, a high-level operative in a secret agency that protects the world from supernatural threats. But there is a mole inside the organization, and this person wants her dead.

"This should be a pleasant little interview. All I have to do is put on my scary face."
"You have a scary face?" Ingrid sounded skeptical.
"Yes," said Myfanwy indignantly. "I have a very scary face."
Ingrid surveyed her for a moment. "You may wish to take off the cardigan then, Rook Thomas," she advised tactfully. "The flowers on the pocket detract somewhat from your menace."

Let me start by saying thrillers are not usually my cup of tea but I absolutely LOVED this book and I am so glad I made it my mission to finally get through some of my TBR (from 2016!) and didn't just pass this by.

Myfanwy ("miff-ann-ee") wakes up surrounded by dead bodies with no knowledge of who she is, how she got there, or why there are dead bodies surrounding her. With a note in her pocket (beginning with: "The body you're wearing used to be mine."), she soon finds herself caught up in a complicated life she never asked for.

Her former life left a series of notes and a binder to help her navigate her way through the basics of her job at a secret supernatural agency known as the Checquy Group, how she lost her memory, who is out to get her, and how to stay alive. The notes are how you learn about the world and how it works but for all that they infodump I really, really enjoyed them because they're written in conversational discourse of Myfanwy's prior life. Honestly, I feel like if I had a history professor that could summarize history like Myfanwy, I would have done way better in school.

Throughout it all there's snarking, friendships, and plenty of information to keep you entertained while you try to unravel the mystery.

What a wild ride.

Highly recommended for anyone that likes their paranormal weird.