Le t the hunt begin. During the reading of their grandmother's will, Dan and Amy Cahill learn that the secrets to their family's power is hidden in the form of 39 Clues around the world. At the reading of their grandmother's will, Dan and Amy Cahill are given the choice of receiving a million dollars or uncovering the 39 clues hidden around the world that will lead to the source of the family's power, but by taking on the clues, they end up in a...

As mysterious circumstances bring Giuseppe, Frederick, and Hannah together, their lives soon interlock like the turning gears in a clock and they realize that each one holds a key to solving the others' mysteries.

Time has gone wrong, and best friends Dak Smyth and Sera Froste, together with the young Hystorian Riq, must use the infinity ring to travel back to one of the Great Breaks--a mutiny on the Santa Mara̕--to correct history and defeat the SQ.

Bowser is a mutt, just adopted by eleven-year-old Birdie Gaux and her grandmother, but when they all get home to Grammy's bait and tackle shop in the bayou they discover that their prize stuffed marlin has been stolen--so Bowser decides to investigate, and things quickly become complicated and dangerous.

When Iranian-American Kamran Smith learns that his big brother, Darius, has been labelled a terrorist, he sets out to piece together the codes and clues that will save his brother's life and his country from a deadly terrorist attack.

After earning the right to return to the wolf pack that abandoned him, the exiled Faolan joins the clan as a lowly "gnaw wolf," but his goal of rising in the pack order is threatened when a jealous rival frames him for an unspeakable crime.

"It's Halloween, you 'fraidy mouse!" -- It's Halloween on Mouse Island, and it seemed like everyone was out to get me, Geronimo Stilton! My cousin Trap kept pulling scary pranks on me. And then my sister Thea told me I had to write a book about Halloween in less than one day! Before you could say boo, my nephew Benjamin had dragged me to a graveyard to do research. There I met a very spooky mouse who -- yikes! -- tried to lock me up in her coffin!...

Night after night, a ghost appears in the royal castle of Pergamontio, terrifying the princess. Mangus the Magician doesn't believe in ghosts, but still the King charges him with finding this one and freeing his daughter from its torment. If he can't, Mangus will pay with his life. The magician's only hope is his faithful, street-smart servant boy, Fabrizio, who must solve the mystery of the ghost using logic and reason -- and a bit of magic of his...

For an athlete like Matt Daniels, breakfast is the most important meal of the day. It's also the most dangerous. That's because somebody is about to pull a mean prank. The recipe is simple: just add Monster Blood. As if Matt's problems weren't big and slimy enough, a surprise invitation will lead to even more trouble. How long can Matt survive inside a terrifying theme park?

Robby creates his own comic strips so he can freak out his friends and family. His favorite character is Dr. Maniac, a villain with a wicked grin and even wickeder superpowers. And now Dr. Maniac is on the loose.