Today I got my order from Royal Mail.
This is one stamp set I ordered:
40th day of death of Agatha Christie (issued 15-09-2016)
All the stamps include hidden secrets.
- Murder on the Orient Express
- And Then There Were None
- The Mysterious Affair at Styles (written hundred years ago, published in 1921)
- The Murder of Roger Ackroyd
- The Body in the Library
- A Murder is Announced