"Orphans Philippa, Sam, Thomas, and Max must find out who stole a valuable artifact in order to save to save their home, Dumfrey's Dime Museum of Freaks, Oddities, and Wonders"--

The extraordinary orphans Sam, Philippa, Thomas, and Max have just started to recover from their capture and subsequent escape from the evil Nicholas Rattigan. But the childrens' lives don't stay quiet for long. A slew of bank robberies is terrorizing the city. And when General Farnum, the ringmaster of the museum's now immensely popular flea circus, is charged with murder, the search for the real killer uncovers a plot much bigger than any individual...

Gabe and the other monster hunters arrive in a wildlife management area in West Virginia to investigate reports of a monster called the Mothman--but mostly what they see are owls, until something much larger attacks them in the night.

Looking for alligators in the sewers of New York City seems like a silly idea to Gabe Brown, but his brother is the creator of internet series, Discover Cryptids, so the filming crew sets out to explore the storm sewers--but when one of them panics, they get separated and lost.

After an encounter with a fake Bigfoot, the film crew of the Internet series, Discover Cryptids, heads to the Florida swamps to search for the "Skunk Ape"--but find a crooked ranger who hates Florida panthers, instead.

Four orphans are shocked when their beloved friend, sculptor Siegfried Eckleberger, is murdered. As they investigate, they find clues that his death may be tied to the murder of a rich New York heiress as well as to their own past.

Journeying to the ancient city of Babylon when Bhegad tracks down Marco, the companions face a daunting choice involving a dire trap and a long-lost figure from Jack's past.

Curious when he finds some mysterious balls of light in his photographs during a class trip, New Jersey boy Mark begins a "Weird Club" to investigate strange phenomena, and his first case involves the Jersey Devil.