Gladestrom

From the back cover: "You were absolutely certain that the priceless painting you found on the cart was an original one-of-a-kind piece -- and so was the one just like it. Investigating this matter led you to the giant vineyard and a meeting with an art dealer, whose assistant looks astonishingly like one of the brigands you killed earlier on the way here. Now you've discovered the dead body under the floorboards of the meeting room, and it's the same man you just spoke to five minutes ago in the lobby. What's going on? And why is your companion, the man who paid you to investigate all this, drawing his sword on you and grinning wickedly?"