Ivy Sparrow and her big brother Seb discover a city beneath London where ordinary objects have magical powers. When their grandmother Sylvie is rushed to the hospital, and their house is ransacked, Ivy Sparrow and her annoying big brother Seb find themselves in a completely uncommon world, a secret underground city called Lundinor where ordinary objects have amazing powers. It seems that their family is connected to one of the greatest uncommon treasures...

Thirteen-year-old Dinah Lance is in a rock band with her two best friends and has a good relationship with her mom, but when a mysterious figure threatens her friends and family, she learns more about herself and her mother's secret past.

"Nora and Ben's younger sister Birdy loves to keep secrets...One day Birdy watches her mother spit into a tube, ready to send it off to find out more about herself...Birdy spits into a tube, too, when no one sees her. But when the test results come back, they are a surprise. Birdy is seemingly not related to Nora and Ben's parents. But if she is adopted, how could that have happened without the children knowing?"--

"For Annie's tenth birthday, her papa gives her a pad of paper, some colored pencils, and the Klimas family secret. It's called the nuodeema burna, or eater of sins. Every time Annie misbehaves, she has to write down her transgression and stick the paper into a hidey-hole in the floor of their house. But Annie's inheritance has a dark side: with each paper fed to the burna, she feels less guilty about the mean things she says and does. As a plague...

"1919. Mama is ill. Father has taken a job abroad. Nanny Jane is too busy to pay any attention to Henrietta and the things she sees - or thinks she sees - in the shadows of their new home, Hope House. All alone, with only stories for company, Henry discovers that Hope House is full of strange secrets: a forgotten attic, ghostly figures, mysterious firelight that flickers in the trees beyond the garden. One night she ventures into the darkness of Nightingale...

A clue takes Amy and Dan Cahill to Egypt, where they investigate the origins of the rivalry between the Tomas and Ekaterina branches of their family and try to figure out if they can trust a message from their dead grandmother Grace.

A million dollars, or a clue? Police report a break-in at an elite hotel, and the suspects sound suspiciously like Amy and Dan. There's a car and speedboat chase and an angry mob! When there's a clue on the line, anything can happen.