Secret of the Staircase: Something's lurking beneath the famous staircase at The Jefferson, Richmond's historic downtown hotel. Back in 1895, when the hotel opened, real alligators roamed free in the courtyard fountains. That was ages ago...or was it? When young brothers Sam and Derek arrive at The Jefferson for an elegant wedding weekend with their parents, they love exploring the old hotel. But when the wedding rings go missing and Sam is blamed, the boys and their friends must hunt down the truth no matter where it leads.

Bryce would never have just left. Thirteen-year-old Zach knows that deep in his bones. Something terrible must have happened to his older brother. So when the green-eyed fox leads him to a hidden message from Bryce deep within their favorite game’s virtual universe, Zach knows he must act quickly. Teaming up with his best friend, a skillful classmate, and Bryce’s girlfriend, Zach races into a real-world mission to decode his brother’s mysterious warning.

On a visit to a coastal harbor town, the world is Noah’s oyster as long as the stormy weather doesn’t ruin the fun. Summer break has just begun, and with seven days of freedom, how much trouble can 13-year-old Noah, his best friend, and his sister really find? Plenty, as it turns out. Because when the kids go snooping around an old decommissioned lighthouse, its troublesome secrets begin to reveal themselves, and the kids are about to stumble upon a hundred-year-old mystery that still haunts the nearby fishing village.

Almost a year has passed since Stella and Tom discovered a time tunnel and travelled to early 1900s London, where they befriended Emma, Lucy ,and Jack. The magical moles that made the tunnel and secret lake appear have since vanished, but the children are longing to meet again. Then an illness, which puts Emma’s life in danger, changes everything. The moles reappear, just when needed, and Lucy realizes the only hope of finding a cure lies in the future.

When Stella and her younger brother, Tom, move to their new London home, they become mystified by the disappearances of Harry, their elderly neighbor's small dog. Where does he go? And why does he keep reappearing wet-through? Their quest to solve the riddle over the summer holidays leads to a boat buried under a grassy mound, and a tunnel that takes them to a secret lake.