Sam Siciliano has had three vampire novels  published:

    BLOOD FARM: AN IOWA GOTHIC, Pageant Books, mass market paperback, 1988.
    BLOOD FEUD, Pinnacle Books, mass market paperback, 1993, reprinted 2001.
    DARKNESS, Pinnacle Books, mass market paperback, 2001.

He has also had two Sherlock Holmes novels published.
 
    THE ANGEL OF THE OPERA, Otto Penzler Books, hardcover, 1994.  Reprinted in 2011 as,
         THE FURTHER ADVENTURES OF SHERLOCK HOLMES: THE ANGEL OF THE OPERA,
             Titan Books, trade paperback and various e-book formats.

     His newest Holmes novel THE FURTHER ADVENTURES OF SHERLOCK HOLMES: THE WEB WEAVER
        is  being published by Titan Books in January 2012.  It is available from Amazon as a trade paperback and on
        Kindle.  It is also available in the other major e-book formats.