Marcos Calo

With help from their cousin Harry, eight-year-old twins Ella and Ethan discover who is illegally taking coral from the reefs near their aunt and uncle's beach house on the shore of Australia's Coral Sea.

Separated from their parents in Beijing, China's Forbidden City, second-grade twins Ethan and Ella luckily find an ancient map that helps them find their way.

"Twins Ethan and Ella are in the Maasai Mara in Kenya, and there's another mystery to solve. Where are all the lions? Ethan and Ella spot lots of cool animals, but the one they're most excited about, they can't seem to find"--Provided by publisher.

While in Machu Picchu, Peru, with their parents, eight-year-old twins Ethan and Ella cross a secret bridge and discover a mysterious stone sculpture.

Josh and Jenny are disturbed that their school is suddenly overrun with nearly identical substitute teachers who ask strange questions and record everything that the students say--but when their own teacher disappears the twins set out to find out what is going on, and who is responsible, and the reader must choose the solution.

Art, mystery, fun and friendship, combine in this illustrated middle grade series debut. Sixth grader Edmund Xavier Lonnrot, codename "Eddie Red," has a photographic memory and talent for drawing anything he sees. When the NYPD is stumped by a mastermind art thief, Eddie becomes their secret weapon to solve the case, drawing Eddie deeper into New York's famous Museum Mile and closer to a dangerous criminal group known as The Picasso Gang.

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Follow Sam, Egg, Gum, and Cat as they try to solve the mystery on their field trip to the Botanical Garden. After a rare fruit has been stolen form the garden, the junior detectives are on the case! Readers will love being able to choose from 12 possible endings and following the crew as they get out of some tight scrapes and some close calls.

Follow Sam, Egg, Gum, and Cat as they try to solve the mystery on their field trip to the carnival. The junior detectives are thrilled to go to a carnival: games, rides, funnel-cake—what could go wrong? Unfortunately, someone has stolen the electronic cards that serve as tickets and game-winning trackers, and the sleuths have to take the case to save their field trip fun. Readers will love being able to choose from 12 possible endings and following...

Follow Sam, Egg, Gum, and Cat as they try to solve the mystery on their field trip to a notoriously mysterious military station, Area 99. After a few mysterious thefts, some scary claw marks, and more than a couple of strange noises, the junior detectives need to solve the case: could it really be an alien? Readers will love being able to choose from 12 possible endings and following the crew as they get out of some tight scrapes and some close calls....

When Samantha "Sam" Archer and her friends in the nature club arrive in Yellowstone Park on a school trip, they find that the park superintendent's son may have been kidnapped.