Only the Cat Knows

Who wanted to kill Vanessa?  Her twin brother, Vance, is wanting to know.  But how to get into the house, to get the answers, fool everyone, including his sister's cat, Gloriana.  Twists and turns, secrets, missing bodies, monks chanting - makes for an excellent story.  Vance's ability to fool everyone (except the cat) is diabolical.  And, how is he able to fool them - I won't tell.  You'll have to read the book.