Grandfather Crypto — Anthony W. Eichenlaub

Aged, annoyed, and ready to tear it all down. Ajay Andersen broke cryptography, but there are still plenty of secrets. A work of art is stolen from the Minneapolis Arts Institute, but there's something strange about this modern Russian masterpiece. It's a callback to a simpler time and a step forward into the future. Its value is not in provenance or materials. It's in knowledge. And someone's desperate to learn the truth. When the thieves ask Ajay to solve this unsolvable puzzle, he needs to decide what he cares about more: staying hidden or staying safe.