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Solve the mystery with the Secret Seven - everyone's favourite detective club! These timeless stories are perfect for young fans of mystery, adventure or detective series. It's their first adventure, and the Secret Seven super-sleuths are already on the trail of a mystery! The gang are dressed in disguise, following a lead to a spooky old house in the snow.... Solve the mystery!

Theodore Boone is back in a new adventure, and the stakes are higher than ever.... When his best friend, April, disappears from her bedroom in the middle of the night, no one, not even Theo Boone - who knows April better than anyone - has answers. As fear ripples through his small hometown and the police hit dead ends, it's up to Theo to use his legal knowledge and investigative skills to chase down the truth and save April.

Hilton Cubitt is worried. Drawings of "dancing men" keep appearing around his house and they're frightening his wife, who seems to know what they mean. Can our brilliant hero solve the mystery of these drawings before disaster strikes?

This collection includes K is for Kidnapped, L Is for Lucky, M Is for Mummy, and N Is for Nugget. Someone has kidnapped the king and queen of Socotra. For safety's sake, their son is staying with Dink until they are safe. But then the prince is kidnapped, too! Can Dink, Josh, and Ruth Rose unmask the royals' enemies before it's too late? Or is the royal family of Socotra gone forever?

These are just some of the 10 brain-twisting mysteries that Encyclopedia Brown must solve by using his famous computerlike brain. Try to crack the cases along with him!

Thirteen-year-old Theodore Boone thought the danger had passed, but he’s about to face off against an old adversary: Accused mur­derer and fugitive Pete Duffy. On a field trip to Washington, DC, Theo spots a familiar face on the Metro: Duffy, who jumped bail and was never seen again. Theo’s quick thinking helps bring Duffy back to Strattenburg to stand trial. But now that Duffy knows who he is, Theo is in greater danger than he’s ever been in before. Even when every­thing is on the line, Theodore Boone will stop at nothing to make sure a killer is brought to justice.

Ben Ripley may only be in middle school, but he's already pegged his dream job: CIA or bust. Unfortunately for him, his personality doesn't exactly scream "secret agent". In fact Ben is so awkward, he can barely get to school and back without a mishap. Because of his innate nerdiness, Ben is not surprised when he is recruited for a magnet school with a focus on science - but he's entirely shocked to discover that the school is actually a front for a junior CIA academy.

Summer's finally here, and Derek Fallon is looking forward to pelting the UPS truck with water balloons, climbing onto the garage roof, and conducting silly investigations. But when his parents decide to send him to Learning Camp, Derek's dreams of fun come to an end. Ever since he's been labeled a "reluctant reader", his mom has pushed him to read "real" books - something other than his beloved Calvin & Hobbes.

Something weird is going on! First the school bus gets a flat tire, and then Mrs. Kormel is totally lost in the middle of nowhere! Mrs. Kormel is the weirdest bus driver in the history of the world, and she's driving everyone crazy!

It’s the height of summer in Moreland, and Grace Griffin and her fellow warden Tom Eely are sweltering in the heat until they answer a strange call for help that comes through on the amazing Griffin map. After teleporting to Oakwell, they find the town paralysed by a freezing snowstorm, which is ruining the famous summer market that brings in visitors and trade. Using their mystery-solving skills and amazing inventions, can Grace and Tom find the cause for the weird weather and restore summer from the snow?

Stranded in Mexico after nearly capturing the leaders of SPYDER, 13-year-old Ben Ripley desperately needs to take a shower. But even more so, he and his spy school friends need to come up with a new plan to defeat their enemies, their only clue a key that opens...something. The mission: go rogue from the CIA, join up with the British MI6 to locate the leader of SPYDER, the enigmatic Mr. E, and bring down the evil organization once and for all.

Help Dink, Josh, and Ruth Rose solve mysteries from A to Z! This collection includes Detective Camp, Mayflower Treasure Hunt, White House White-Out, and Sleepy Hollow Sleepover.

They said his uncle Ian died in a car accident. Alex Rider knows that's a lie, and the bullet holes in his uncle's car confirm the truth. But nothing can prepare him for the news that the uncle he always thought he knew was really a spy for Britain's top-secret intelligence agency. Enlisted to find his uncle's killers and complete Ian's final mission, Alex suddenly finds himself caught in a deadly game of cat and mouse, with no way out.

Sherlock is on the trail of a murderer. As he investigates the death of country gentleman John Douglas, he begins to piece together some unusual clues: muddy bootprints, a tattoo, and something called "The Valley of Fear." Can Holmes put these together in time to solve the mystery?

Fourteen-year-old Mona isn't like the wizards charged with defending the city. She can't control lightning or speak to water. Her familiar is a sourdough starter, and her magic only works on bread. She has a comfortable life in her aunt's bakery making gingerbread men dance. But Mona's life is turned upside down when she finds a dead body on the bakery floor. An assassin is stalking the streets of Mona's city, preying on magic folk, and it appears that Mona is his next target. And in an embattled city suddenly bereft of wizards, the assassin may be the least of Mona's worries.

Join the world's greatest detective, Nate the Great, as he solves three mysteries! Perfect for young listeners, this long-running chapter book series encourages children to problem-solve with Nate, using logical thinking to solve cases. Nate the Great, Where Are You?: Can a detective get a day off? Nate the Great and his dog, Sludge, want to take a break from solving cases. So, they hide out in the woods. But soon, they hear familiar voices shouting, "Nate the Great, where are you?" There are many mysteries to solve!

A coach driver has been murdered...and it looks like the killer is going to get away with their terrible crime. The only clue is a torn piece of paper in the victim's hand, with a few words written on it. With the help of this single tiny clue, can our legendary sleuth unravel the mystery?

John Grisham delivers high-intensity legal drama for a new generation of readers in the seventh novel in his best-selling Theodore Boone series. One of Theo's best friends, Woody Lambert, has been arrested. Woody's not guilty, and Theo must do everything in his power to exonerate his friend and shield him from an unforgiving youth court system.

International best seller David Baldacci pens the stunning conclusion to Cahills vs. Vespers! David Baldacci is the author of 23 books for adults, each of which has become both a national and international best seller.

Once Amy and Dan Cahill's choice was simple - take a million dollars or the first of 39 Clues that lead to the source of unimaginable power. Now it's clear that the hunt for Clues is bigger than anything that Amy and Dan could ever have imagined.