A Christmas Mystery Adventure for Teens & Tweens!

A girl with a secret. A criminal mastermind. And two billion dollars in counterfeit currency. While the rest of the world prepares to celebrate Christmas, Jeffrey and his friends uncover a plot to flood Los Angeles with billions of dollars in counterfeit currency. Their investigation leads them to a master criminal, his hoodlum son, and a mysterious 15-year-old girl who holds the key to the entire puzzle.

With time running out and Jeffrey's heart falling for the secretive girl, will he and his friends foil the ingenious plot or be swept away into a life of crime? Action-packed from start to finish, readers have voted this their favorite book in the series!

Perfect for fans of: The Hardy Boys and Three InvestigatorsStuart Gibbs' Spy School seriesAaron Johnson's National Park Mystery seriesLauren Magaziner's Case Closed seriesP.J. Nichols's Puzzled Mystery Adventure seriesWillow Night's Sycamore Street Mystery seriesJohn Grisham's Theodore Boone series

A Personal Note to Parents These are the type of solve-them-yourself, teen detective mystery books that I enjoyed reading in the 5th, 6th, 7th, 8th, and 9th grade, often late at night while under the covers and holding a flashlight. They're actually the first in an entirely new genre for young readers: Teen and young adult mystery fiction for smart boys and clever girls.

"Books are precious things, but more than that, they are the strong backbone of civilization. They are the thread upon which it all hangs, and they can save us when all else is lost."-Louis L'Amour

A book is a friend that will never leave you.

The Case of the Hollywood Art Heist When 14-year-old Jeffrey hears a scream from the house next door, he dashes outside and is shocked by what he sees: a swarm of police officers arresting the old brother of Jeffrey's classmate for stealing a valuable painting.

Jeffrey and his best friend Pablo immediately set out to investigate the crime. Together with their friends Marisol and Susie, they find themselves in a dark and dangerous mystery, where no one is telling the truth and everyone has something to hide. With time running out, the four friends must marshal all of their detective skills to solve an impossible crime, rescue an innocent man, and prove their own worth.

The Case of the Dead Man's Treasure A graveyard at midnight, cloaked in mist and concealing hidden treasure. A trio of sinister treasure hunters who will stop at nothing to get their hands on the prize. And four teenage detectives in a race against time.

The Case of the Deadly Double-Cross Framed for murder! All Jeffrey wanted to do was help a friend from school find her missing father. He had no way of knowing it would lead to his being arrested for the man's murder. Now after a daring escape, he and his friends must solve an impossible crime and catch a killer-before the police catch them.

The Case of the Jilted Juliet A mysterious note found in a school library book leads Jeffrey and his friends to suspect that a girl who committed suicide was actually murdered. Their investigation leads to a haunted library, a web of lies and long-buried secrets, and a list of suspects that includes their own high school principal.

Homework is Hard, Murder is Easy A murder has been committed and 15-year-old Jeffrey thinks he knows who did it. There's only one problem. The person Jeffrey suspects is the most popular football player at school, and at the time of the girl's death he was on the field in front of hundreds of witnesses, leading his team to victory. How can a person possibly be two places at once?