In a futuristic world where humans and robots are at war, a boy goes on a search to find his missing military father.

On the day of Henry Ludd's thirteenth birthday, the power goes out. No phones, no news, people descending in lawlessness-- and in the chaos, Henry's father has gone missing.

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.

Eleven-year-old Juniper sets out on a wild adventure to find her mother and protect a public park just days before Christmas.

After fourteen-year-old Ozzy's scientist parents are kidnapped, Ozzy's only help may be a classified ad that says "Wizards for hire."

Hilary Westfield is now sailing the seas as the Terror of the Southlands, but when Miss Pimm is discovered missing, Hilary decides to find the Enchantress with the help of first mate Charlie, finishing school friend Claire, and the always intrepid gargoyle.

As the boundaries between worlds begin to dissolve, Lyra and her daemon help Will Parry in his search for his father and for a powerful, magical knife.

When their favorite author fails to arrive as scheduled to speak at the local library, the Alden children investigate how he could board a train and never be seen again.

Having been judged Different, Norbert, Drew, and Sophie are banished from the United State of Earth to Astronuts Camp on Zorquat 3 in the Orion Nebula, interfering with Norbert's quest to find his parents.

When the difficult star of the reality television show "Expedition Survival" disappears while filming an episode in the Florida Everglades using animals from the wildlife refuge run by Wahoo Crane's family, Wahoo and classmate Tuna Gordon set out to find him while avoiding Tuna's gun-happy father.