When the Hardy Boys set out to solve the mystery of their missing chums, they discover a gang hide-out in a cave on an island along the way.

Teddy Fitzroy must solve the crime of the kidnapped rare and expensive panda, Li Ping.

Twelve-year-old Gen, a foster child living in New York, discovers she is a long-lost princess of the Kingdom of Raldonia, and must solve the mystery behind a threat to the crown.

When Henry's magic teacher, The Amazing Arthur, goes missing right before the Greenfield Magic Shop's annual magic show, Henry and his sibilings look into Arthur's disappearance.

After summer break Anastastia and Edie are back at their boarding school, Knight's Haddon, but the friendship they forged last year is threatened by the arrival of a new girl, Janet, who befriends the orphaned Edie--but when Edie begins to think that Janet may not be exactly what she seems to be, events take a dangerous turn.

"Rebecca Zamolo is on a mission to save her summer. Instead of going to camp like she'd planned, she's been stuck in summer school. But today is the day! She's going to present her final science assignment--using her Nana's borrowed vintage zoetrope--and then she'll be free to have fun. But as Becca and her classmates wait for her teacher to arrive, a menacing voice comes over the intercom claiming to be the Game Master! The kids quickly discover...

"Siblings Seth and Julia practically live at Waldameer, the local amusement park, during the summer. While showing their friends around the park, they find an old locket near the carousel. How long has the locket been lost, and what's the photograph inside it? Most importantly: whose locket is it Their quest to find the locket's owner unearths Waldameer history in the process. Follow Seth, Julia, Tyren, and Anh as they search for clues, outsmart bullies,...

In Washington, D.C., twelve-year-old Florian Bates, a consulting detective for the FBI, and his best friend Margaret must uncover the truth behind a series of private middle school pranks that may or may not involve the daughter of the President of the United States.

"The Earth Day Fair is days away, but Nate's classroom project--a robot named Mr. Butler--has disappeared. Nate the Great and his dog, Sludge, take on the unusual case, and they are soon searching high and low in and around the school. Will Nate find the robot in time for the fair?"--

Colin and Nevaeh find vintage letters that lead to interlocking mysteries from the 1970s and '80s, and they learn about "women's lib," the ERA, and other social issues from that time in history-and the way echoes from that era affect Colin and Nevaeh themselves. When Colin finds a shoebox full of letters hidden in a stranger's attic, he knows he's supposed to throw them away. That's his summer job, getting rid of junk. But Colin wants to rescue the...