How was Stonehenge created? Did circle builders use math to arrange the stones? What happens on Midsummer Day? Some things are so strange that they cannot be explained. This series explains the connection between science and natural phenomena and how science can be used to try to explain mysteries.

In a chilling entry to the award-winning Ruth Galloway series, she and DCI Nelson are haunted by a ghost from their past, just as their future lands on shaky ground. DCI Nelson has been receiving threatening letters. They are anonymous, yet reminiscent of ones he has received in the past, from the person who drew him into a case that's haunted him for years. At the same time, Ruth receives a letter purporting to be from that very same person--her former mentor, and the reason she first started working with Nelson. But the author of those letters is dead. Or is he? The past is reaching out for Ruth and Nelson, and its grip is deadly.

Evoking the narrative sweep of "The Clan of the Cave Bear" and the spiritual resonance of "The Celestine Prophecy", Lambert creates an extraordinary debut novel of prehistoric life. The story of three wise women--each called Zena, yet born thousands of generations apart--who live by the ways of love and compassion, and explore the evolution of the human body, mind, and soul.

Cumbria is a land built from stone. Whether it is Hadrian's Wall, Kendal Castle or the beautiful fells of the Lake District – for thousands of years people have found a certain elegance and utility in stone. Nestled amongst these common relics are a multitude of massive stone monuments, built over 3,000 years before British shores were ever touched by Roman sandals. Cumbria's 'megalithic' monuments are among Europe's greatest and best-preserved ancient relics but are often poorly understood and rarely visited. This updated and revised edition of Cumbria's Prehistoric Monuments aims to dispel the idea that these stones are merely 'mysterious'. Within this book you will find credible answers, using up-to-date research, excavation notes, maps and diagrams to explore one of Britain's richest archaeological landscapes. Featuring stunning original photography and illustrated diagrams of every megalithic site in the county, Adam Morgan Ibbotson invites you to take a journey into a land sculpted by ancient hands.

'My favourite series' Val McDermid DCI Nelson has been receiving threatening letters telling him to 'go to the stone circle and rescue the innocent who is buried there'. He is shaken, not only because children are very much on his mind, with Michelle's baby due to be born, but because although the letters are anonymous, they are somehow familiar. They read like the letters that first drew him into the case of The Crossing Places, and to Ruth. But the author of those letters is dead. Or are they? Meanwhile Ruth is working on a dig in the Saltmarsh - another henge, known by the archaeologists as the stone circle - trying not to think about the baby. Then bones are found on the site, and identified as those of Margaret Lacey, a twelve-year-old girl who disappeared thirty years ago. As the Margaret Lacey case progresses, more and more aspects of it begin to hark back to that first case of The Crossing Places, and to Scarlett Henderson, the girl Nelson couldn't save. The past is reaching out for Ruth and Nelson, and its grip is deadly.

Cristyn Stone is unhappy about spending her summer in a small town in Wales while her father researches a book. The 16th-century stone house they are staying in holds a haunting secret. Strange noises, weird dreams, a girl ghost, and a mysterious connection to her late mother draw 14-year-old Cristyn deeper into the mystery.

There are mysteries in the woods of the Hudson Valley of New York and northern New Jersey. There are stone sites that are assumed to be the work of colonial farmers, but why do they have precise astronomical alignments? Could they be the work of Native Americans or Pre-Columbian voyagers? Author and researcher Linda Zimmermann explores stone chambers, perched boulders, standing stones, and massive walls that may just be unique historical treasures that must be studied and preserved.

In an absorbing mystery thriller, a teenage girl with a past arrives in a city: new name, new identity, new foster family. She has chosen the city herself, and is fascinated by its harmony and beauty, but is clearly in fear of discovery. She is nursing a secret from her early childhood, a secret that produces new terrors for her the moment she fears her identity has been spotted. A parallel narrative tells of a young architect's apprentice, Zak, in 1750 - working with Jonathan Forrest, a man obsessed with past Druidic mysteries and a new architectural vision for the city. He plans to create the world's first circular terraced street, the King's Circus - a plan greeted with scorn and derision. Zac soon realises there's more than just obsession with an architectural vision; there is some secret associated with building a hidden chamber in the centre of the Circus. But Zac himself has his own confused and highly destructive agenda ... These narratives are framed by the voice of Bladud - mythical first builder of the city, destined to die in trying to fly. And ultimately his narrative brings all together in a clever and brilliantly intriguing climax.