The ritualistic murder of a British professor at the University of Exeter points to a startling cast of suspects: his own students. All are enrolled in a postgraduate program covering the history of witchcraft, folklore, and spiritualism. All evidence points to Sharyn Karr—an American student. Prior to the professor’s death, he had thrust a centuries-old book upon her. It appears to be the handwritten and encrypted diary of an eighteenth-century mystic and occultist, the Comte de Saint-Germain. The professor begged her to keep the text safe, ending with a warning. Trust no one.

A dauntless young hero. An army of brutal monsters. An impossible quest. Journey to the mountain ... In an isolated valley, a small tribe of humans is dying from a terrible illness. There are rumours, however, that the trolls of Troll Mountain, the valley’s fearsome overlords, have found a cure for the illness: A fabulous elixir. When his sister is struck down by the disease and his tribal leaders refuse to help him, an intrepid youth named Raf decides to defy his tribe and do the unthinkable.

Brent Walker is returning home to Concord, a quaint town in central Georgia nestled close to the Savannah River. Ten years ago, after the sudden death of his wife, Brent closed his law practice, said goodbye to his parents, and moved three hundred miles away to a self-imposed exile. His father died two years ago, and now Brent’s coming back to take care of his ailing mother, hired by Southern Republic Pulp and Paper Company as an assistant general counsel.

The first mission to Europa – Jupiter's enigmatic moon – has landed, and humanity’s darkest fears are about to awaken. For years, mankind has speculated that this frozen world harbours a hidden ocean twice the size of all Earth’s oceans combined – an ocean potentially teeming with life. Driven by this tantalising mystery, they venture forth to unlock its secrets. But what they discover in the abyssal depths is far beyond anything they could have imagined.

Verity Beresford is worried about her husband. Oliver didn’t come home last night so of course Verity goes straight to Judith Potts, Marlow’s resident amateur sleuth, for help. Oliver, founder of the Marlow Amateur Dramatic Society, had hired The Marlow Belle, a private pleasure cruiser, for an exclusive party with the MADS committee but no one remembers seeing him disembark. And then Oliver’s body washes up on the Thames with two bullet holes in him—it’s time for the Marlow Murder Club to leap into action.