Well, we still have one victim to guess and since it's the victim of the very first murder it can't be Katniss Everdene (the only other theoretically remaining option), since she was expressly excluded in the game's first round.
Walter Mosley's Red Death, which I finished a few days ago, is genre crime fiction; in addition, its author's first name begins with one of the letters in WATSON.
Lydia Bennet can't possibly die too many literary deaths, so I kind of hope she's a victim in our round as well. (Mean streak -- me?)
Margaret Drabble's The Red Queen contains an extremely annoying POV character in its second part -- who also happens to do more than her fair share of stupid things -- in addition to which, the author's last name begins with one of the letters in "Lydia".