April Fools' Day is long and hard for the third-grade Huit octuplets, but it is nothing compared to the challenges of Tax Day, through which Jackie discovers her special power and gift and learns more about their parents' mysterious disappearance.
One month after their parents' disappearance, the third-grade Huit octuplets deal with a malfunctioning refrigerator and try to win the love of the only boy in their class at Valentine's Day, while Dorinda discovers her special power and gift.
When Charlie Hitchcock, the smartest kid at school, gets a note from the school bully, Tyler Yu, demanding a meeting he fears the worst--but it turns out that Tyler wants him to solve the mystery of the missing magician at the Abracadabra Hotel.
Charlie and Annie find Tyler and the magician Brack on the thirteenth floor of the Abracadabra Hotel, but Charlie and his friends still have to solve the mystery of who is trying to steal the twelve priceless statues of Enrico Endriago which have been locked in room 1308 for fifty years.
Brack, owner of the Abracadabra Hotel, has disappeared at a critical time, and once again Charlie Hitchcock and Tyler Yu team up to solve the mystery--they know he never left the hotel, but the only clues they have is a few words scrawled on a piece of paper and a clump of fake red hair.
On New Year's Eve, the octuplets Huit--Annie, Durinda, Georgia, Jackie, Marcia, Petal, Rebecca, and Zinnia--discover that their parents are missing, and then uncover a mysterious note instructing them that each must find her power and her gift if they want to know what happened to their parents.
During the month of June, Petal, one of the eight Huit octuplets, gets her power, which she uses to great advantage when Crazy Aunt Serena tries to kidnap Rebecca and throw her off the Eiffel Tower while the rest of the family attends a wedding.
The Huit octuplets discover Marcia's special power--the ability to see through things--which helps when their evil neighbor calls Social Services to report that they are living alone because their parents have not returned from wherever they disappeared to.
Capitol City's Natural History Museum is haunted - or at least that's what someone wants people to think. But Wilson Kipper, son of the museum's head paleontologist, knows better. When the mysterious occurrences go from spooky to dangerous, the museum is forced to close its doors. Can Wilson and his friends get to the bottom of things, or will the Natural History Museum be closed for good?
A shipment of dinosaur bones meant for a new exhibit has been stolen from the Capitol City Natural History Museum! But even worse, the group of paleontologists working on the shipment has disappeared too-and among them is Wilson Kipper's mother. Wilson and his friends are determined to get to the bottom of the mystery, but can they do it in time to save his missing mom?
When the plans for the prototype of a failed flying machine go missing from the Air and Space Museum's archives, Amal's father, the assistant archivist, is blamed. No one suspects a crime has been committed - except Amal and her friends. With her father's job on the line, it's up to them to track down the missing plans and get to the bottom of the museum mystery.
When Clementine Wim spots a famous painting being carried away from the Capitol City Art Museum, she knows something is wrong. But when she arrives at the museum, the painting is hanging right where it should be. No one believes what Clementine saw: not even her mother, an assistant curator at the museum, or her friends. It's up to Clementine to convince the others and determine fact from forgery before it's too late.
A priceless sculpture has been stolen from the Capitol City Art Museum! But with insurance money to cover the theft and build a new education wing, no one is overly worried about getting the missing art back. The only ones who seem concerned with solving the case are Clemetine and her friends. Can these determined detectives get to the bottom of the art-museum mystery before it's too late?
When the spacesuit of famous astronaut Sally Ride is stolen from a traveling exhibit, there's no shortage of suspects in Capitol City. Thankfully, Amal Farah, daughter of the Air and Space Museum's head archivist, and her friends are on the case. But they're running out of time and clues are hard to come by. Can they solve the mystery of the space case before the one-of-a-kind artifact is lost for good?
A ghost has been spotted lurking around Capitol City's American History Museum. It seems someone-or something-is unhappy with the museum's recent exhibit on the Vietnam War. Can Raining Sam, the son of the head of educational programs at the museum, and his friends figure out who's behind the haunting before someone gets hurt?