Erma Bridges' life is far from perfect, but entirely ordinary. So when she is shot twice in a targetted attack by a colleague, her quiet existence is shattered in an instant.

With her would-be murderer dead, no one can give Erma the answers she needs to move on from her trauma. Why her? Why now?

So begins Erma's quest for the truth - and a dangerous, spiralling journey into the heart of darkness.

With all the inventiveness of The Seven Deaths of Evelyn Hardcastle and the raw brutality of Mulholland Drive, THE SPIRAL is a unique crime thriller with killer twists - and 2021's most jaw-dropping ending.