This is book number 3 in the Bright Empires series.
The quest for the Skin Map, originally tattooed on The Man Who is Map is now in pieces and scattered across time and space in a universe of multiple realities.
But what if the true treasure isn't the map at all . . . what if the map marks something far greater? Those wanting to unlock that mystery are in a race to possess the secret - for good or evil. Kit Livingstone is mastering the ability to travel through the Omniverse using ley lines and has forged a link from the Bone House, a sacred lodge made of animal bones, to the fabled Spirit Well, a place of profound power.
His friend Mina, still determined to find Kit, is beginning to experience a greater destiny than she can fathom.Enter Cassandra Clarke. She is overseeing an archaeological dig in Arizona when a chance encounter transports her to 1950s Damascus. There, she finds herself pursued by the Seekers--members of the Zetetic Society who need her help to track down the missing Cosimo Livingstone and his grandson Kit.They're all desperate to gain the ultimate prize in a treasure hunt where ancient history, alternate realities, cutting edge physics, eternal mystery, and philosophy intersect. The next clue might reside at The Spirit Well.
Well of Souls, from medieval Oxford to modern-day Spain, from the pyramids of Egypt to an ancient shrine in China, the race continues for a prize beyond all imagining.