Even a public person has protection against intentional libel.
And, it's clear she can PROVE the author and the publisher knew the information to be both false and harmful.
Prima facie case of libel.
Random House will shortly have a new owner.
The owner of Random House is German conglomerate Bertelsmann. Mega-corp. Palin could win 100 million and make a dent, but only a dent. But Palin suing would at damage its reputation, and serve as a warning to all publishers who want to remain “respectable.” The slime of the world, Larry Flynt, Gawker, etc., will go on as before.