The girl with kaleidoscope eyes

After being hired to ghostwrite a new book about their family, Hoagy investigates a man claiming to be the Aintree sisters' father, who disappeared years ago.
Richard Aintree's only novel was a modern classic on par with The Catcher in the Rye. But after his wife's death he went into mourning-- and no one has heard from him in twenty years. Now Aintree-- or someone pretending to be Aintree-- has reached out to his two estranged daughters, Monette and Reggie. Both sisters have received mysterious typewritten letters from their father. Hoagy had already been hired to ghostwrite a tell-all book about the troubled Aintree family. When murder strikes, it's up to Hoagy to catch the killer, and pour himself that perfect single-malt Scotch ... before it's too late.