When Ted and Kat's cousin Salim disappears from the London Eye ferris wheel, the two siblings must work together--Ted with his brain that is "wired differently" and impatient Kat--to try to solve the mystery of what happened to Salim.

Seventh-grader Frankie, who has various sensory disorders, is determined to find her missing best friend, Colette, before it is too late.

While Dora is out looking for their breakfast all six of her chicks disappear.

A girl finds herself running through the forest at the edge of a village with no memory of anything, even her own name, and later learns that she might be twelve-year-old Isabelle, believed to be stolen by a witch six years before.

Levi and Kat are about to discover a very dark side to their neighborhood. Nothing ever seems out of place in the safe, suburban town of Cowslip Grove. Lawns are neatly mowed, sidewalks are tidy, and the sounds of ice cream trucks fill the air. But now...kids have been going missing--except no one even realizes it, because no one remembers them. Not their friends. Not their teachers. Not even their families. But Levi and Kat do remember, and suddenly...

Thirteen-year-old Grace and her eleven-year-old brother Carter are watched by a mountain man when they get lost during a strenuous hike on Blood Mountain.

"Orphan Seren Rhys is on her way to a new life at the remote country mansion of Plas-y Fran when she is given a package by a stranger late at night in an empty train station. The package contains a crotchety, mechanical talking crow, which Seren reluctantly brings to her new home. But when she gets there, the happy Christmas she had hoped for turns out to be an illusion--the young son of the house, Tomos, has been missing for almost a year, rumored...

Bear's animal friends come to his rescue when he becomes lost and frightened in the woods.

Little Critter and his mother get separated at the mall.

While at Science Camp with her class, Katie Magically turns into the strict head counselor and gets everyone lost on a hike.