AN ANCIENT PHILOSOPHY
A MYSTERIOUS BROTHERHOOD
A YOUNG WOMAN CAUGHT IN A BATTLE
OVER THE FATE OF MANKIND

In 530 B.C. a mysterious ship appeared off the rainy shores of Croton in what is now Italy. After three days a man disembarked to address the curious and frightened crowd that had gathered. He called himself Pythagoras. Exactly what he said that day is unknown, but afterwards a thousand men and women abandoned their lives and families to follow him.

Over the centuries they became a secret society of powerful individuals safeguarding the teachings of one of history's most brilliant mathematicians.

But now, triggered by a brutal murder in Chicago, the brotherhood erupts into civil war, and a young woman finds herself at the centre of ancient revelations that could become not just instruments of terror but a threat to modern existence . . .

PRAISE FOR KEVIN GUILFOILE-

'Gripping, creepy. Guilfoile does it with more panache than Crichton'
NEW YORK TIMES

'A rare treat - a book to savour, contemplate, and admire'
STEPHEN WHITE

'A riveting new novel . . . you'll stay up all night until all the pieces fall into place'
SARA PARETSKY

'Guilfoile is a bright new star in the crime fiction universe, but so much more than that'
C.J. BOX