In 1453, seventeen-year-old Luca Vero, accused of heresy and expelled from his monastery, is recruited to help investigate evil across Europe but frees his first subject, Isolde, from captivity in a nunnery, and together they seek the one who defends the boundaries of Christendom and holds the secrets of the Order of Darkness.

As the Council attempts to strip Charlotte of her power, sixteen-year-old orphaned shapechanger Tessa Gray works with the London Shadowhunters to find the Magister and destroy his clockwork army, learning the secret of her own identity while investigating his past.

Luca and Isolde continue their journey searching for evil in medieval Christendom.

"Twins Ethan and Ella go on an adventure in Greece, where they learn about the mystery-solving Society of Apollo"--

A distinguished Harvard professor of religious symbolism receives a mysterious call from a science research center in Switzerland. One of the scientists has been brutally murdered and has a symbol branded on his chest that looks like an Illuminati sign. Professor Langdon has studied the Illuminati but is totally unprepared for the horrible events that will soon engulf him.

A scholarship student at prestigious St. Aidan the Great School, Greer is delighted by an invitation to an exclusive weekend of "huntin' shootin' fishin'" until she learns she and the other misfits are the prey.

In 1666, after four months away, friends Christopher Rowe, Tom, and Sally return to London triumphantly but, guided by coded riddles, face a conspiracy that threatens Christopher, as well as the King himself.

"The Family Fang meets The Storied Life of A.J. Fikry in this literary mystery about a struggling bookseller whose recently deceased grandfather, a famed mathematician, left behind a dangerous equation for her to track down--and protect--before others can get their hands on it. Just days after mathematician and family patriarch Isaac Severy dies of an apparent suicide, his adopted granddaughter Hazel, owner of a struggling Seattle bookstore, receives...

Tasked to expose a coin counterfeiting scheme, Luca and Isolde, whose romantic attraction continues to grow, travel to Venice in 1454, where they meet an alchemist who plans to create the Philosopher's Stone, a mystical substance said to be capable of turning base metals into gold and producing the elixir of life.

Natasha Romanov, called the Black Widow, agent of S.H.I.E.L.D, rescues a young girl from Ivan, the man who once trained her as an assassin--and eight years later she is called upon to protect the teenager Ava has become from a threat from the past--and possibly from S.H.I.E.L.D itself.