"Third-grader Aven Green has been solving mysteries for a whole month, cracking such cases as The Mystery of the Cranky Mom. But can this perceptive detective solve two cases at the same time? First her teacher's lunch bag disappears. Then Aven's great-grandma's dog goes missing. Fortunately, since Aven was born without arms, all the "arm" cells went to her super-powered brain instead. (That's her theory.)"--

Rendered a ghost by a bicycle accident, young Finn McAllister teams up with fellow spirit Isabella Rojas to commit invisible pranks on the living, before discovering that they cannot move on to the afterlife.

JJ, the search and rescue dog, is ready for a bit of rest and relaxation after solving the mystery of the missing chicks, but there is a new dog next door who is stealing the attention of Moosh and her chicks and the threat of a roaming possum keeps JJ on the alert.

"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 letters--and find out what really happened to best friends Rosemary and Toby way back in the 1970s. Meanwhile, across town, Nevaeh also finds a mysterious letter. But this one reads like a confession to a crime. And Nevaeh knows her father, the 'Junk King,' expects...

Idaville's secret weapon against lawbreakers, ten-year-old Encyclopedia Brown, assists the police force with ten insoluble cases. Solutions are at the back of the book.

When a cyberbully posts embarrassing rumors about other students at school, Drew, to protect her own secret, puts her sleuthing skills to good use to find the culprit, who just might be one of her closest friends.

Bunny and Jack, animal detectives, take a break from playing cards to look for Bernard Bear's missing messenger whistle.

When a calf is murdered, Hank, the wiley Cowdog and Head of Ranch Security, pursues a gang of wild dogs and a clan of coyotes to find the killer.

Bunny and Jack investigate the disappearance of a trombone from Mr. Riley's music store.

Eccentric Aunt Jane needs help on her ranch so the Aldens, affectionately known as the Boxcar Children, get help from a private detective. Violet and Jessie begin an adventure when they journey to Centerville to keep Aunt Jane company on the family ranch.