Here.  And someone has started a petition calling on Mellen Press to drop its suit.

UPDATE:  The Gawker site has some fun with this.

ANOTHER:  CHE also has a story, which points out that in October 2012, Mellen Press called on its authors to defend the publisher's reputation at various on-line fora.  As opposed to suing critics, that seems like a quite sensible and constructive response!  I'm still mystified, though, how the Press could think suing a librarian, and thus bringing the wrath of all the world's academic librarians down on you, was a smart strategy.  I also think that a sensible public relations person would advise the Press to withdraw the suit and do a mea culpa, at the same time defending the quality of its catalogue against the criticisms.  (There is apparently a separate libel suit by the individual who founded Mellen Press, Herbert Richardson, against the same librarian for a different set of comments about Mr. Ricahrdson's prior professional career.  If, in fact, the statements in question are false, that separate suit might have merit.)

AND YET ANOTHER:  This story has some bearing on Mr. Richardson's personal suit agains the librarian, and sugests the allegations there are also, alas, without merit.