When the squirrel Tail comes barreling into the chicken coop ranting about a round, shiny, green, big, scary thing in the yard, Dirt, Sweetie, Poppy, and Sugar investigate this strange object.
Thirteen-year-old Ruby, a genius code-cracker and daring detective, gets an anonymous call setting a challenge that leads her to the headquarters of Spectrum, a highly secret anti-crime agency that needs her help to crack a code, but soon Ruby uncovers dastardly plans of the Fool's Gold Gang.
After Marvin, a beetle, makes a miniature drawing as an eleventh birthday gift for James, a human with whom he shares a house, the two new friends work together to help recover an Albrecht Durer drawing stolen from the Metropolitan Museum of Art.
"Edward G. Garrison, better known as Egg, is pretty excited about the Science Club's field trip to the zoo. They'll get to see a rare display of island foxes, an endangered species. But when the club arrives, they learn that the foxes have been nabbed! Can Egg and his friends find the foxes?"--Unedited summary from book.
"Three Chicago students, Melissa, Wilf, and Bondi, are unlikely participants in a competition for a ten thousand-dollar scholarship, unaware that there is much more at stake." --
Twelve-year-old Gil Goodson competes against thousands of other children at extraordinary puzzles, stunts, and more in hopes of a fresh start for his family, which has been ostracized since his father was falsely accused of embezzling from Golly Toy and Game Company.
Her grandfather's dying words lead thirteen-year-old Theodora Tenpenny to a valuable, hidden painting she fears may be stolen, but it is her search for answers in her Greenwich Village neighborhood that brings a real treasure.
"Twelve-year-old Kyle gets to stay overnight in the new town library, designed by his hero (the famous gamemaker Luigi Lemoncello), with other students but finds that come morning he must work with friends to solve puzzles in order to escape"--
When Amelia "Millie" Ashford gets an invitation to spend the night in Amelia Earhart's childhood home with five other girls, she can't believe her luck. When she gets there, Millie discovers Amelia Earhart's famous flight goggles that are about to be sent to a museum in Washington, D.C. During a scavenger hunt, the girls realize the goggles have gone missing, and Millie was the last one seen with them. As other strange things start happening, the...
Elizabeth, eleven, spends Christmas break at Winterhouse hotel under strange circumstances, where she discovers that she has magic, and her love of puzzles helps her solve a mystery.
For most of Tony Gilbert's life, he has thought of his uncle as "Weird Uncle Charlie." That is, until Uncle Charlie moves in with Tony and his family. Uncle Charlie is still odd, of course--talking about spirits and other supernatural stuff--but he and Tony become fast friends, and Tony ends up having a lot of fun with Uncle Charlie. When Uncle Charlie dies suddenly, Tony is devastated. Then he starts seeing Uncle Charlie everywhere! It doesn't help...
After his father loses his job and the family decides they will have to sell their house, Nicholas--a music and math genius--learns that his grandfather has hidden treasure all around town, enough to save the family. Together with a few classmates and two grandfathers--who will have to first be broken out of their nursing home--Nicholas sets out to solve the biggest problem of his life.
When seemingly unrelated and strange events start to happen and a precious Vermeer painting disappears, eleven-year-olds Petra and Calder combine their talents to solve an international art scandal.
Puzzle-crazy, twelve-year-old Winston and his ten-year-old sister Katie find themselves involved in a dangerous mystery involving a hidden ring. Puzzles for the reader to solve are included throughout the text.
Two eleven-year-old misfits try to solve the mystery of a dead magician and stop the evil Dr. L and Ms. Mauvais, who are searching for the secret of immortality. This is the story of a secret, and also a secret story. This is the story of Cass and Max-Ernest, two friendless 11-year olds who come together to solve the mystery surrounding a dead magician and the clues he left behind. When they find a mysterious case containing vials of liquid labeled...
When twelve-year-old aspiring detective Myrtle Hardcastle learns her neighor in quiet Swinburne, England, a breeder of rare flowers, has died she is certain it was murder and that she must find the killer.--
As his family's dog-friendly bed-and-breakfast establishment in dog-friendly Carmelito, California, welcomes celebrity dog Sir Bentley, twelve-year-old Epic McDade and his younger siblings investigate the disappearance of a $500,000 dog collar.
After years in foster care, April gets to live in a mansion where she and four other children are caught up in a mystery related to a missing heir, a lost legacy, and the Phantom.
