When their father is sent away to prison, three London children move to the country where they keep busy preventing accidents on the nearby railway, making many new friends, and generally learning a good deal about themselves.

When Jerry, Jimmy and Kathleen are forced to spend their entire summer at school they don't imagine they will have a particularly interesting time. But that's before they stumble upon a mysterious castle set in beautiful, abandoned gardens. Could this really be an enchanted castle? Don't be a duffer, there's no such thing. But with the air thick with magic, the sun blazing down, and a maze hiding a sleeping girl at its centre, the holidays might just...

Eleven-year-old Theodosia has the ability to detect black magic and ancient curses that are attached to objects in the Museum of Legends and Antiquities, which her father is the curator of, and discovers that a new artifact from Egypt is cursed and she must return it to the tomb it was excavated from before it destroys the British Empire.

Eleven-year-old Theodosia's ability to detect black magic raises her suspicions about a magician known as the Great Awi Bubu, while Henry, home for the spring holidays, discovers an artifact at the Museum of Legends and Antiquities that is coveted by every black-cloaked occultist in London.

In 1902 England, Clarry and Peter struggle with the challenges of living with an indifferent father, but the summers they spend in Cornwall with their grandparents and cousin Rupert provide much needed comfort, and in the years that follow Clarry looks back on those leisurely days to help her cope with the trying times of World War I and its aftermath.

Anthea, Cyril, Robert, and Jane meet the Psammead again and set out to find the second half of a magical amulet, leaving Edwardian London to travel to ancient Egypt, Babylon, Atlantis, and more.

While searching for a new story idea for her magazine, the Penny Dreadful, Penelope Tredwell discovers that her alias, Montgomery Flinch, has been accused of a jewel theft. Penelope sets out to solve the mystery and clear Flinch's name while keeping his true identity a secret.