Valuable Records

From: Detective
Description: I can’t believe that we’re about to reveal the secret of Saltaformaggio’s chest, and that I’ll be able to use his inventions in my investigations. There’s one final thing left - we should find some City artifacts, then the chest will reveal its main secret to us.
Completed: Incredible, Saltaformaggio’s chest is open! Look, here’s his secret book. It holds the secrets of spy technology. And there’s a letter from Adolfo Saltaformaggio himself. He’s congratulating us!