Originally Posted by Teflonknight
They definitely exist, not sure which source book. In the Secrets of Sarlona book there is a feat specifically for hook swords called Flying Tiger. It allows you to hook the swords together and use them as a reach weapon. Which they did in the show IIRC.
That feat is in secrets of sarlona because that's the book they gave the twin hook stats in.
Yes, they are a monk weapon. Not a terribly impressive one though.