As Karabekian feels around the underside of the shelf, he find something like a catch, he pulls and tucks and there's a loud crack as the wood splinters. He yelps and pulls his hand back, finding a large gash across his palm, blood pooling up (-1 HP)
There's a thud as a secret drawer drops out from under the bottom shelf. Inside are a few books - Primer in Greek Vocabulary, Two accounting ledgers, a bundle of receipts, an obsidian knife (identical to the one Valentin saw under the body) and another book wrapped in silk cloth.