The Summer Book tells the story of the relationship between Sophia, an eight-year-old girl who is growing up fast, and her grandmother, who is nearing the end of her life. They are spending time together with Sophia’s father, at the family summer house on a tiny unspoiled island in the Gulf of Finland. All three are coming to terms with the recent death of Sophia’s mother in very different ways.
| Writing | Tove Jansson | Novel |
| Directing | Charlie McDowell | Director |
| Production | Kevin Loader | Producer |
| Production | Aleksi Bardy | Producer |
| Production | Helen Vinogradov | Producer |
| Production | Charlie McDowell | Producer |
| Writing | Robert Jones | Writer |
| Production | Kath Mattock | Producer |
| Production | Duncan Montgomery | Producer |
| Production | Jack Selby | Executive Producer |
| Production | Arthur Farache | Executive Producer |
| Production | Victoria Castelli | Executive Producer |
| Production | Lily Collins | Executive Producer |
