As the new Keepers of the School, sixth-graders Ben and Jill must decipher a handful of clues written as maritime riddles to save their school from demolition by a greedy company.

Pepper and Jake, sister and brother shepherds, match wits with the giant, Urk, who regularly floods their valley with his dirty washwater.

A sultan's daughter who loves numbers and riddles devises a plan to find the man who is best suited to be her husband.

After a flying lizard carries off his little sister, Rowan of Rin and three companions are guided by a rhyming riddle on a journey to the land of their old enemy, the Zebak, in order to rescue her.

While trying to rescue a kidnapped princess by first solving a difficult riddle, a team of fairies learns to enjoy life's simple pleasures.

Rhyming text provides clues for the various Halloween themed pictures hidden under the flaps.

"After finding a mysterious key, eleven-year-old Lin Rosenquist finds herself in the wintery world of Sylver where all the inhabitants were once either beloved pets or tamed wild animals, and must find the missing Winter Prince before she can return home"--

Ami Oswald and her four escape room challenge teammates realize the danger in the rooms is very real and they must solve the mysterious riddle the Host has given them before it is too late.

Anouk, Ben and Cara dream of a fabulous treasure buried on the golden island across the harbor. A mysterious and grizzled old man offers them passage on his boat, but only if they can solve seven vexing riddles. If they succeed, a strange and magical prize awaits them.

Fourteen-year-old Daphne, spunky and imaginative, has grown up in a London orphanage dreaming she will someday learn the identity of her parents and become a prima ballerina, and when a mysterious package arrives with a pair of stockings and a book inscribed with a riddle, her journey to the truth begins.