These novels -- Murder In Duplicate and others -- appear to be self-published, available from Amazon or from bridgemysteries.com. I'm curious.
Browsing the bridge section of the NYPL (and then, just now, obviously, the web), I've noticed quite a bit of bridge-themed fiction. I refer not to "Five Weeks to Winning Bridge" and other such pipe dreams, but actual novels that hinge on cards for their drama. I have read none of these:
Bridge Below the Belt
The Bridge Adventures of Robin Hood
Richelieu Plays Bridge
Death By Contract
and many more.
Watch this space for my own serialized bridge fiction, Clever Pun TK.