Caught between the Un and the Fold sits the islet of Midst… When their ramshackle postal ship crashes on a mysterious new landmass, siblings Rowan and Ogden have to make the best of it. Adventurous Ogden convinces reluctant Rowan to make a fresh start in the strange new islet that sits between the bright Un and the dark Fold. But Midst holds dangers that will challenge Ogden and Rowan’s family bonds as well as their will to survive.