Someone was stealing manuscripts. Not published books... unpublished ones. Unreleased novels from Margaret Atwood, Sally Rooney, a Pulitzer Prize winner. Works that didn't exist yet, in anyone's hands but the author's.

For five years, nobody knew who it was. Or how they were doing it.

The method turned out to be almost embarrassingly simple. And the motive? Even stranger than anyone expected.

This week on Plot Twist, we go inside the publishing industry's most bizarre crime and the one question that nobody could quite agree on an answer to: what exactly did the Spine Collector want?