Making a terrible discovery at the stream about a mysterious threat that is endangering its magical creatures, Zoey and Sassafras race against time to discover the source of the problem and save the Merhorse species.

When dinosaur bones from a recent dig mysteriously go missing, and an unidentifiable beast starts attacking animals and people, leaving their mangled bodies behind, Abigail and her eccentric employer R. F. Jackaby, investigators of the supernatural in 1892 New England, find themselves hunting for a thief, a monster, and a murderer.

Matt Cruse, a student at the Airship Academy, and Kate de Vries, a young heiress, team up with a gypsy and a daring captain, to find a long-lost airship, rumored to carry a treasure beyond imagination.

In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically-engineered beasts.

When Sarah's brother, Louis, is eaten by a Gulper, Sarah does not panic but follows the trail as the Gulper is eaten by a series of other creatures until finally she has her chance to rescue Louis from them all.

Twelve-year-old Rufus Takada Collins discovers feylings on his grandfather's farm and it is up to him and his cousin Abigail to find the magical train cars that will carry them safely home.

As an employee in the Fabled Stables, young Auggie must protect all fantastical creatures, even the irritatingly talkative furry tails that have attached themselves to the human residents of Rainbow's End.

A boy awakens, blindfolded, with no memory of even his name, but soon meets Lord Umber, an adventurer and inventor, who calls him Happenstance and tells him that he has a very important destiny--and a powerful enemy.

Introduces the part-dinosaur, part-truck monsters called Dinotrux, including Dozeratops, Digasaurus, Velocitractor, and Tyrannosaurus Trux.

Crusty dragon Miss Drake's new pet human, precocious ten-year-old Winnie, not only thinks Miss Drake is her pet, she accidentally brings to life her "sketchlings" of mysterious and fantastic creatures hidden in San Francisco, causing mayhem among its residents.