When Scott and Jack Carter have to stay with their great aunt for the summer they steel themselves for the most boring holiday ever. But then they meet Emily Wild and her loveable dog, Drift. Emily shows them the lighthouse, the castle - and the amazing whistling caves. Legend has it that when the caves stop whistling the castle will be attacked - and that's exactly what happens! Priceless treasures are stolen and Emily and the boys are determined to investigate. But how was the treasure smuggled out of the castle? Why did the caves stop whistling? And can the friends solve the mystery in time to catch the thief? The first in an exciting new adventure series - with five more gripping mysteries to come!

When Scott , Jack and Emily hear that a film is being made at the nearby manor house they can't resist going to watch. But when the glamorous star of the film vanishes the friends realize they have a new mystery to solve! Has the star been kidnapped by a crazed fan? Could she have run off with her boyfriend? Or did she venture into the manor's attic at midnight and fall foul of the legendary ghost that haunts the old house? The second gripping mystery in this exciting new adventure series!

A game of hide and seek in the old Castle Key lighthouse during a violent thunder storm leads to an amazing discovery - a tattered old treasure map! Scott, Jack and Emily can't wait to search for the hidden gold but first they must solve the clues to uncover its secret hiding place. And someone else is after the gold too - someone who doesn't plan to let anyone get in their way! Can our heroes figure out the map, outwit their enemy and find the hidden treasure? The third title in this fabulous new series packed with mystery and adventure!

Wind Cave is one of the longest and most complex caves in the world. Complete with more than 100 miles of surveyed cavern passageways below ground and 28,295 acres of diverse ecology above, Wind Cave National Park is an American treasure with an impressive history. The first recorded discovery of Wind Cave occurred in 1881 when brothers Jesse and Tom Bingham followed the sounds of the whistling wind and came upon the cave. In 1903, the cave and surrounding area became Wind Cave National Park, the seventh national park in the nation and the first created with a cave as its focal point. In the 1930s, the Civilian Conservation Corps (CCC) established a camp near the park headquarters. The CCC built roads and buildings, landscaped and made improvements to better accommodate tours inside the cave.

When Ryan Flint accompanies his journalist mother to an archaeological expedition in Egypt's Valley of the Kings, he isn't expecting life-threatening danger and a 3,000-year-old murder mystery - but that's exactly what he finds! Before he knows it, he has joined forces with Cleo McNeil, an archaeologist's daughter, to solve secret codes, discover an ancient treasure and outwit a strange cult intent on gaining possession of the relic. Can Ryan and Cleo unravel the mystery and solve the Phoenix Code before it's too late? Indiana Jones meets THE DA VINCI CODE in this exciting new series for readers of 9+.

2032. The human race has established colonies on Mars. For years Dr. Alwyn Stafford researched its biggest mystery: Did life evolve on the Red Planet? The answer, except for simple, long-dead microorganisms, was no. Now retired, Stafford stubbornly continues his quest. Rumors say he's been going farther than ever before into the Martian deserts. Then he goes out and doesn't return. As the search for him grow, it becomes apparent that the old man found something that will forever change humanity's place in the cosmos... At the Publisher's request, this title is being sold without Digital Rights Management Software (DRM) applied.