Bestselling author Tess Gerritsen is also a physician, and applies her expert knowledge of emergency procedures and autopsies to her novels.

She studied anthropology at Stanford University, where she catalogued human remains that were hundreds of years old.

She continues to travel the world, pursuing her interests in ancient cultures and mysterious natural phenomenon. She lives with her husband in Maine.

Dave Eggers was born in Boston in 1970. He is the author of A Heartbreaking Work of Staggering Genius, You Shall Know Our Velocity, The Unforbidden is Compulsory, How We Are Hungry, Short Short Stories, Teachers Have It Easy, Surviving Justice, What is the What, How the Water Feels to the Fishes, The Wild Things, Zeitoun, A Hologram for the King, The Circle and Your Fathers, Where Are They? And The Prophets, Do They Live Forever?

A Hologram for the King and The Circle are both currently in production for major film adaptations. Dave Eggers is the founder of McSweeney's independent publishing house, the 826 National network, and the nonprofit organisation ScholarMatch. He lives in Northern California with his family and Heroes of the Frontier is his seventh novel.

Emma Donoghue is an Irish writer living in Canada. Her 2010 novel, Room, was an internationally award-winning bestseller and was shortlisted for the Man Booker and Orange Prizes. Emma's screenplay for Room's multi-award-winning film adaptation has earned her an Oscar nomination.

The Lottery's More or Less is the second book in her children's series The Lotterys. Caroline Hadilaksono was born in Indonesia and moved to Los Angeles when she was twelve. She now lives and works in New York, where she is a freelance designer and illustrator, working on everything from children's books to murals.

Douglas Preston is a renowned author of both fiction and non-fiction, including The Codex, Relic and The Book of the Dead (co-written with Lincoln Child), which topped the New York Times bestseller list for six weeks. He has written articles for The New Yorker, Reader's Digest, National Geographic, Harper's, Smithsonian and Atlantic.

He also worked for the American Museum of Natural History as managing editor of Curator magazine. Mario Spezi is an Italian journalist writing for La Nazione, who has been investigating the Monster of Florence case since the first murders in 1974.