From the Charred Remains (Lucy Campion Series #2)

It's 1666 and the Great Fire has just decimated an already plague-ridden London. Lady's maid Lucy Campion, along with pretty much everyone else left standing, is doing her part to help the city clean up and recover. But their efforts come to a standstill when a couple of local boys stumble across a dead body that should have been burned up in the fire but miraculously remained intact—the body of a man who died not from the plague or the fire, but from the knife plunged into his chest.