I missed this book when it came out in 2008, and only read it recently. What a delightful book! The year is 1946, and writer Juliet Ashton is looking for her next book subject. She receives a letter from a man who lives on Guernsey, who had discovered her name written inside a book. As she and the man correspond, she finds out more about the residents of the island, and begins corresponding with them also. As the letters stream back and forth, Juliet (and we) learn about the German occupation of the Channel Islands.
Part of the appeal of the book for me was that it is composed entirely of letters between characters. It's a unique way to craft a story. This has been turned into a movie, to stream on Netflix sometime in 2018, but I highly recommend that you read it first!