There are a few books I would love to see made into films, will have to think about who would be good to play the roles though... although I am thinking Jenny Colgan's Little Beach Street Bakery, the character Polly could be played by Joanna Page, and Sophie Kinsella's Twenties Girl, Sadie could be played by Maisie Williams. I think she could suit a 1920s flapper girl, with Emilia Clarke or Emma Watson as Lara.
Tommy and Tuppence by Agatha Christie. I had always wanted to read Christie, but I hadn't heard of this series. I have read the first book, but they do seem hard to find.
I haven't read it yet, but i voifht The Essex Serpent because of a couple of reviews on here and I kept seeing it, so I read the sypnopsis and was intrigued.
I am sure they'll be plenty more where they came from...