Santa Claus is missing, and a host of arctic animals searches for him in the snow.

Auntie Departed invited all of Ghoulia's friends, and a grouchy cousin she had never met, to a surprise dinner party, but the biggest surprise is that Auntie is missing. Includes instructions on how to write an invitation and how to plant a garden.

Thirteen-year-old Lucy Eberslee, the Gatekeeper's deputy at the end of the world, teams up with Arthur and Rosemary, who are from other worlds, to investigate why the doors between worlds are stuck.

Twelve-year-old Maddie, who suffers from anxiety, loves music, math, and everything in its place, but when her older brother Strum disappears from his college campus, her family starts slipping away from her.

When three teenaged boys suspect that their English teacher is responsible for their friend's disappearance, they must navigate a maze of assorted clues, fraying friendships, violence, and Dostoevsky's "Crime and Punishment" before learning the truth.

Tai, seventeen, and Manon, eighteen, lured to the Mediterranean island from which their world-famous mother mysteriously vanished a decade earlier, discover her lost screenplay, White Fox, which reveals clues to the truth. Told in multiple voices.

On a cold winter day in Chicago, Early's father disappeared, and now she, her mother and her brother have been forced to flee their apartment and join the ranks of the homeless--and it is up to Early to hold her family together and solve the mystery surrounding her father.

Jamie Watson and Charlotte Holmes are looking for a winter break reprieve in Sussex after a fall semester that almost got them killed. But nothing about their time off is proving simple, including Holmes and Watson's growing feelings for each other. When Charlotte's beloved uncle Leander goes missing from the Holmes estate -- after being oddly private about his latest assignment in a German art forgery ring -- the game is afoot once again, and Charlotte...

Told in two voices, a seventeen-year-old battered and bruised girl struggles to remember who she or the man claiming to be her father is while seventeen-year-old Drew stops at nothing to find his missing girlfriend.

When a girl goes missing in her secluded Appalachian town, seventeen-year-old Linden, who can taste other people's emotions, recovers haunting memories of her own disappearance and explores the legend of the Moth-Wigned Man, leading her to wonder if thereare some secrets best left buried.