Solid 4.25 stars. The market seems to be almost over saturated with WWII books currently, and although it is my favorite genre, a book has to be really special to stand out. This story was close as I had never heard of the National Pigeon Service so it was a new take. I liked all of the main characters - Bertie, Susan and Ollie and the story was engrossing. It didn’t have a wow factor, but definitely worth a read!