Ten-year-old Flavia and her friends encounter the Roman admiral Pliny before making a journey to her uncle's farm near Mt. Vesuvius, where they try to solve a riddle, reunite a family, and get out of the path of a natural disaster.

Tiga Whicabim is settling in to the witchy, glitzy world of Ritzy City where Peggy is Top Witch, but when Fran the Fabulous Fairy visits Linden House, the girls realize that witches all across town are starting to disappear.

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

After moving with her parents to a remote English island, fourteen-year-old Jess attempts to dispel an ancient curse by solving a series of riddles, aided by Epsilon, a supernatural being.

A man slays a dragon that had has his girlfriend spirited away with a bread knife, while another man wakes up trapped in a jar.

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.

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle. Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles -- which will take four books, of course! Dolphins at Daybreak begins the third set of four books in this magical (and increasingly popular) series! Jack and Annie are off in the Magic...

Batman has been kidnapped by the Riddler! The crook has left behind one of his infamous riddles, addressed to Robin. If Robin can solve the puzzle, he will locate the Caped Crusader, but that first riddle leads to another. Then the Riddler turns off all the lights in Gotham City. What, Robin wonders, is the point? When will the riddles end? If the Boy Wonder cannot find his partner by the next sunrise, Batman will be gone forever.

When students in Mr. Tiffin's class are invited to solve a riddle during a field trip to an apple orchard, it is Tara's daydreams that may lead to the answer.

"Marie-Grace can't wait to begin her journey up the Mississippi River with her father. The steamboat they're traveling on is the biggest and fanciest boat Marie-Grace has ever seen. It's crowded with all sorts of interesting passengers, including Wilhelmina Newman, a girl her age. Wilhelmina is traveling alone, and she's carrying a secret in one of her trunks--clues to hidden Gold Rush treasure. Marie-Grace and Wilhelmina have to unravel the clues...