Tina Fey’s new cachet as a Sarah Palin impersonator is paying off big, in the form of a $5 million book deal, said the New York Post. The Emmy-winning star of Saturday Night Live and 30 Rock will write a book of “nonfiction humor” for Little, Brown. Since Fey began playing Palin on SNL this season, the show’s ratings have been up 49 percent.