London is emerging from the shadow of the Second World War, and writer Juliet Ashton is looking for her next book subject. Who could imagine that she would find it in a letter from a man she's never met, a native of the island of Guernsey, who has come across her name written inside a book by Charles Lamb.... As Juliet and her new correspondent exchange letters, Juliet is drawn into the world of this man and his friends – and what a wonderfully eccentric world it is.

Janvier 1946. Tandis que Londres se relève douloureusement des drames de la Seconde Guerre mondiale, Juliet, jeune écrivain, cherche un sujet pour son prochain roman. La lettre d'un inconnu, natif de Guernesey, va le lui fournir. Juliet pénètre alors un monde insoupçonné, délicieusement excentrique ; celui d'un club de lecture au nom étrange inventé pour tromper l'occupant allemand. De lettre en lettre, Juliet découvre l'histoire d'une petite communauté débordante de charme, d'humour, d'humanité. Et puis vient le jour où elle se rend à Guernesey.

London in den späten vierziger Jahren: Die temperamentvolle junge Schriftstellerin Juliet erhält eines Tages einen erstaunlichen Brief...

January 1946 and writer Juliet Ashton receives a letter from a man in Guernsey, who has found her name written inside a book. As they exchange letters, she is drawn into the eccentric world of The Guernsey Literary and Potato Peel Pie Society, which boasts a charming cast of characters, from pig farmers to phrenologists, literature lovers all. Captivated by their stories, she sets sail for Guernsey, and what she finds will change her forever.