Should the Obamas decide to actually collaborate on a book, inside sources suggest that the resulting book deal would be worth “many millions of dollars more,” especially since they both have sky-high approval ratings relative to other departing presidents and First Ladies in recent history. And if the Obamas are interested in maximizing their advance, one editor has some advice on what their book (or books) need to contain: It’s a little bit difficult to imagine the protocol-obsessed Obama engaging in any explosive gossip for a memoir, and the same is true of Michelle. But apparently the world’s top publishers are optimistic that it could happen, and they’re willing to spend $40+ million to help make sure it does.