The book takes the form of a dossier of documents, letters, clippings and notes compiled by an unnamed individual referred to as The Archivist.

In 1940, three children including Maggie Coulson (the Log Lady), Carl Rodd (the trailer park owner from Fire Walk with Me) and Alan Traherne, go missing in the woods, re-appearing with strange triangular markings on their bodies, and no memory of that day.

The Archivist is revealed to be Major Garland Briggs, whose final entry in the dossier notes that "something's wrong" with Dale Cooper and ends with the word "*M*A*Y*D*A*Y*".

[3] Devan Coggan of Entertainment Weekly wrote "More than 25 years after Laura Palmer was found wrapped in plastic, Twin Peaks co-creator Mark Frost returns to the Pacific Northwest with a new novel structured as a secret dossier.

Assembled by a mysterious 'archivist' and annotated by an FBI agent known only as TP, this enigmatic collection includes undiscovered Lewis and Clark diary entries, UFO sightings, and personal journals of Twin Peaks residents.

[4] Eric Diaz of Nerdist commented "If you love Twin Peaks, there is no way I can't recommend this book to you, although it really is made for the hardcore fan.