Between The Lines: The inside scoop on the book world

RE-UPPING, SHOPPING, AND SOAPING When authors hit it unexpectedly big, publishing houses often quietly renegotiate their contracts to keep them happy. Case in point: Doubleday just inked a new $5 million, four-book deal with E. Lynn Harris, no doubt spurred by the No. 1 debut of his latest novel, Not a Day Goes By. Harris calls the figure ''a big jump'' that ''puts me among my best-seller peers.'' ... Trident Media may not have permanent phones yet, but the agency just founded by ex-William Morris agent Robert Gottlieb is already shopping its first book: The Kennedy Curse, a history of the family's tragedies by journalist Ed Klein ... Later this fall HarperCollins CEO Jane Friedman will make a cameo appearance on the daytime soap Passions to sign up Hidden Passions: Secrets From the Diaries of Tabitha Lenox, a memoir by a character on the show. The book — by an unnamed romance writer — is real, and HarperEntertainment will publish it in late January. ''Jane loves the concept of publishing in the real world at the same time as in a fictional one,'' says editorial director Hope Innelli.