The Rook (The Checquy Files, #1)

The Rook is the 2012 debut novel of Australian author Daniel O'Malley. It follows protagonist Myfanwy Thomas as she attempts to re-integrate into her life of administrating a clandestine government organization responsible for protecting the U.K. from supernatural threats. Following a mysteriously induced bout of amnesia, she works to uncover the identity of a traitor inside the organization while simultaneously keeping her amnesia a secret. The title of the book is a reference to Thomas' rank in her organization, the Checquy. The sequel Stiletto was simultaneously released in the United States and United Kingdom on 14 June 2016 through Little, Brown and Company.