Darla Pettistone may have inherited her great aunt Deeâ€™s Brooklyn bookstore, but itâ€™s the storeâ€™s mascotâ€”an oversized black cat named Hamletâ€”who acts like he owns the place. And when someone turns up dead, Hamlet smells something rotten in Brooklynâ€¦Â As the owner of Pettistoneâ€™s Fine Books, Darla is settling nicely into her new life, even reaching an uneasy truce with Hamlet. Unfortunately, when she needs to hire a new clerk, the finicky feline decides to lend a paw to the hiring process. He chases away applicants who donâ€™t meet his approval, finally settling on an unlikely candidate: Robert, a book-loving Goth kid who has a secret only Hamlet knows.Â And Hamlet canâ€™t seem to stay out of trouble. One of the bookstoreâ€™s regular customers, a man who is renovating a local brownstone, claims heâ€™s seen Hamlet prowling the neighborhood. When the manâ€™s business partner is found dead, Darla discovers that Hamlet may have been the only witness to what could be murder. With the crafty catâ€™s help, she wonders if they just might be able to pounce on a killer...