The 48-year-old orders a pot of tea and says goodbye to her husband, who is accompanying her on this leg of her three-month book tour. Picoult does this every year with every new novel - she has a rock-star schedule matched only by her following, nicknamed the #jodiverse on Twitter.
Struggling writers might think that this commercial success should negate any need for literary fanfare, but it sticks in her craw. "If a woman had written One Day [by David Nicholls], it would have been airport fiction. Look at The Marriage Plot by Jeffrey Eugenides. If I had written that, it would have had a pink, fluffy cover on it. What is it about? It's about a woman choosing between two men. What is The Corrections about, by Jonathan Franzen? It's about a family, right? And I'm attacking gun control and teen suicide and end-of-life care and the Holocaust, and I'm writing women's fiction? I mean, I can't tell you. When people call The Storyteller chick-lit, I actually break up laughing.
Because that is the worst, most depressing chick-lit ever."
Has she ever thought of writing under a pen name?
"I did once," she says. "So let me tell you what happened. I wrote a book under a man's name. It was when The Bridges of Madison County [by Robert James Waller] had been published. Nicholas Sparks was becoming big [as a romantic novelist]. Please don't get me started on Nicholas Sparks," she says, rolling her eyes. "I haven't had enough caffeine yet.
"I was so angry about these men who had co-opted a genre that women had been slaving over for years. There are some really phenomenal romance writers who get no credit, who couldn't even get a hardback deal. And these men waltzed in and said, 'Look what we can do. We can write about love. And we are so special.' And that just made me crazy." Her agent tried to sell her pseudonymous book, but was told it was too well-written for the male romance genre. "So there you go," she says, angry, and yet ever-so-slightly pleased.
Picoult writes good stories, but says she doesn't have one herself. "No," she says. "I'm really boring." She was born in Long Island but moved to New Hampshire when she was 13, where she lives to this day, with her husband and their four dogs, two donkeys and 15 chickens.
She studied writing at Princeton, where she met her husband, Tim, and it was while she was pregnant with their first child that she began work on her first novel. When her career started to take off, Tim quit his job as a sales manager to stay at home with their three children. Now he "mostly does charity work", she explains, making it sound as if their lives are a fabulous inversion of the norm, with Tim cast in the role of a Real Housewife of New Hampshire. "No! That would be the worst show ever!" she squeals, before telling me that he is "honestly the kindest person I know".
Their offspring have all left home now, and are all predictably high-achieving. Her daughter, Sammy, the youngest at 19, is studying psychology and education at Vasser College. Jake is 21, a senior at Yale.
Kyle, her oldest, recently graduated with a Masters from Harvard and is now teaching in Boston.
One of her most recent novels, Sing You Home, focused on gay rights. Her next will be about racism in America. She says she often despairs of her country. "Oh, very often. It's sad sometimes. It is really hard, sometimes, to love there. It's a very polarised country. I still remember waking up after an election and being in a fog for a couple of days and just going: 'Uh, I don't know if I can handle the next four years'." She is a Democrat, no question.
"There's this image of America as the land of the free and the home of the brave, and there are so many wonderful things about it that we take for granted. But on the other hand, it is a country with a large, deep schism running through the middle of it, an ideological schism, and it's often a fault line caused by religion. Whether it's abortion or gun control or gay rights or the death penalty, where you fall on those issues tends to align with what your personal beliefs are in terms of religion. For a country that was founded on the separation of church and state, that sometimes is incredibly depressing."
She thinks that Americans need to get out into the world more. "You know how they have mandatory military service in Israel? I think there ought to be mandatory travel in America. I've really thought about this a lot." She is only half-joking, and on the matter of gun control she has never been more serious. "I think it's a tragedy that, after Sandy Hook, we couldn't get congress to endorse gun control. I can't believe that all those babies that were killed in an elementary school couldn't sway their minds. That to me is disgusting, absolutely disgusting. Sandy Hook should have changed everything."
I wonder, does she ever think about staying on one of her book tours forever, so she doesn't have to go back? For the first time during our interview, she appears to mellow. "You know, I haven't, and that's because of the feeling I get when I come home." She starts to smile to herself.
"When I land in Boston, there's just a flood of relief. We are a pretty amazing country and having an American passport is a pretty amazing thing. And I would not want to give that up."
Leaving Time (Hodder & Stoughton $36.99) is out now.
