Twins Josh and Sophie team up with Nicolas Flamel, a 14th century alchemist, to retrieve an ancient Codex with the secret of immortality and stop the infamous John Dee from destroying humanity. The Secrets of Nicolas Flamel series will take you to Paris, London, San Francisco, and back.

Theo is only eleven, but she's an expert on ancient Egypt, and she knows all about curses, ancient magic, tombs, spells and a secret society out to destroy the world. From London to Cairo to the Valley of the Kings, Theo is in the thick of it.

In Ring of Fire, four kids unearth a secret hidden in Rome – an object older than the ancient Romans, and an underground temple. Another mysterious artifact takes the four to New York City, in search of the Star of Stone. Paris is next adventure, the "city of wind," and a mystery leads them to a ship ... and closer to the secret of Century.

Adventures of Emily and her brother Jessup at a crumbling castle in Scotland with the boggart, a playful spirit that likes to play tricks. In the second adventure, the children and the boggart help Nessie escape from Loch Ness.

Once a lowly squire (The Squire's Tale), Terence is now again in the service of King Arthur and dark forces are at work in England. Terence and his fellow knights come together to try to save Camelot. Action-packed, funny, and good for older kids.

Peter and Kate time travel to 18th century England, where they encounter Gideon Seymour, a gentleman thief, and the nefarious Tar Man. In book two, Kate and the Tar Man return to the present, while Peter remains trapped in the past; the trilogy ends with an exciting "out of time" conclusion in The Time Quake.

Missing children from history have been kidnapped from their own time period. Sent to the Tower of London in 1483, were the two prince Edward and Richard killed or did they vanish on the battlefield of Bosworth? Who could have sabotaged the lost colony of Roanoke, and what happened to Virginia Dare, the first English child born in the New World? Exciting mystery fantasy series.

Young Jake Ransom is an explorer, just like his parents, who disappeared on a dig in the Yucatan. A Mayan coin and a golden artifact transports Jake and his sister to another time and place, the Valley of Calypsos. In Calypsos, Romans, Vikings, Maya and peoples of other Lost Tribes live in peace, except for the threat of the terrible Skull King.

Three luminous fantasy adventures, in The Cabinet of Wonders, Petra Kronos searches in the secrets of the magical astronomical clock. Whisked to Elizabethan London, Petra, gypsies, and English spies search for a globe that charts the stars and navigates rifts in time. In the final book in the trilogy, Petra and her friends Neel and Tomik fight evil Prince Rodolfo with magic, Marvels and ghost hands.

Follow the Smithfork kids on a treasure hunt through New York; seven poems contain puzzles and clues to seven sights around the city. Find the map hidden behind the walls of Smithfork apartment, and solve the mystery – what happened to the Post family fortune?

Mystery adventures in the court of Queen Elizabeth I. Lady Grace, a maid of honor to the queen, solves the mysterious disappearance of her unwanted suitors, and takes on Sir Francis Drake.

In Stratford, talkative young Will Shakespeare uses his skills of observation and play acting to fin out who really murdered old farmer Speight, and keep Viola's identity secret.

Also, another history mystery, this one with young Ben Franklin: The Secret of the Sealed Room

In medieval Italy, there's a conspiracy to overthrow the king, a high official has been killed, and Mangus the Magician has been arrested. His servant Fabrizio is the only thing that stands between the magician and burning at the stake.

Imagine if Sherlock Holmes had a younger sister, and here she is, Enola Holmes, a spirited teenager, hot on the trail of Viscount Tewksbury (the missing Marquess), as well as her mother, who's also disappeared.

On summer holidays in a quiet English village, teenage Sherlock Holmes steps right into a mystery of two dead bodies, involving a strange black, buzzing cloud. Confronted with a sinister mastermind, Sherlock uses his logical mind. A super adventure!

Best friends Kari and Lucas are off to London and Amsterdam in an art mystery, then to highland Scotland in search of a kidnapped pianist, and Kenya on safari, tracking smugglers stealing prehistoric treasures from Simba Hill.

Set in 18th century Japan, teenage Seikei discovers who killed a lord in his own castle, searches for the true sword of the emperor, and uncovers a smuggling ring. In the fourth mystery, seven men are tattooed with a treasure map, a puzzle that leads to a secret plot.

Young Abilene Tucker comes to spend the summer in a dusty Kansas town. A hidden box with mementos and letters in a falling-down treehouse starts her on a hunt to unravel a twenty year old mystery. Not a conventional mystery, this is one of our favorite books!

Adventure and Russian spies in postwar London. Two kids, Janie and Benjamin, discover their Latin teacher is a double agent, and Benjamin's father, the apothecary, is working on a secret project.

Emmajin, the granddaughter of Kublai Khan, aims to become a warrior in the Mongol army. But when she meets Marco Polo in the gardens of Xanadu, another world opens up. Together they travel to western China on a secret mission and find themselves facing a fierce army mounted on elephants. A good teen read.

When Jack is captured by the Northmen and taken away on their swift ships, it's only a beginning of a journey to the icy land of the trolls, along with Olaf, a great warrior, and Thorgil, a shield maiden. Shape shifters, the dangerous Mountain Queen, troll-bears, tellers of tales, this is a fabulous Viking adventure quest.

Flat Stanley's Worldwide Adventures
Sara Pennypacker, Jeff Brown

Flat Stanley can fold up and go anywhere on earth, and he's out for adventure – stopping tomb robbers in Egypt, eluding ninjas in Japan, dogsledding in Canada, tracking spies in Mexico, on safari in Africa, hopping with kangaroos in Australia.

Ten stories of ghosts, priceless lost treasure, a magical wish machine, clever gold thief, Somali pirates, smugglers, venomous snakes, monster hunters, and more. "Guaranteed to thill, chill, and have you so far on the edge of your seat you're actually on someone else's."

Epic adventures of Nick and his sister Kate - a sea chest with a secret inside, storms at sea, 18th century pirates, Spanish galleons, bombing raids on Nazi airfields, Revolutionary War battles and spies. Classic adventures and fun for everyone in the family!

In a worldwide adventure of 10 books, travel with Dan and Amy Cahill starting with the catacombs of Paris, then on to Vienna, Venice, Egypt, Russia, Australia, Indonesia, South Africa, Beijing, the Caribbean, and London, as they solve puzzles, survive assassination attempts, outwit scheming family members, to find the secret that changed history.

The series continues with Vespers Rising, and Cahills vs. Vespers.

Adventures of Nate Fludd, budding explorer, to protect and care for mythological beasts. Accompanied by his intrepid aunt, Nate saves a phoenix in the Saudi Arabian desert, captures the dreaded poisonous basilisk in Africa, tames wyverns (winged dragons) in Wales, and helps a shimmering unicorn in the forests of France.

Martine lives on a game reserve in Africa and has a special gift – she can heal wild animals. In the first adventure, Martine rides a legendary white giraffe. Next Martine and her friend Ben are chased by treasure seekers, but only she can save the last leopard. In the concluding adventure, Martine and Ben unravel the mystery of the Secret Valley.

In this beginning reader series, Annie and Jack are whirled back in time to Italy, Ireland, Japan, France, Egypt, Austria, China, England, India, and more far flung destinations.