“Tatiana Boncompagni, the author of ‘Hedge Fund Wives,’ a novel to be published in May by News Corp.’s HarperCollins, sued her sister Natasha over claims she copied parts of the manuscript and sought copyright protection as its co-author. Tatiana Boncompagni … accused her sister of secretly copying parts of ‘Hedge Fund Wives’ this year during family visits in New York and Milwaukee.”