On its way to the Galápagos Islands, a light aircraft ditches into the sea. As water floods the cabin, zoologist Daniel Kennedy faces an impossible choice—should he save himself, or Nancy, the woman he loves and the mother of his child?

Back in London, Daniel can’t stop thinking about the man he saw while swimming fourteen miles—on the verge of exhaustion and hypothermia—to reach the islands: a smiling figure treading water, urging him to swim just a few strokes farther until his foot touched sand. An adamant atheist, Daniel is certain it was merely a hallucination brought on by his physical state. Or was it?

Meanwhile, in a parallel narrative, Daniel’s great-grandfather, Andrew Kennedy, faces mortal danger during the horrific battle of Passchendaele. But what does the unraveling truth about the life and death of Andrew have to do with Daniel? As secrets are disclosed—from the diary of a military chaplain who knew Andrew and from the enigmatic scribbles on a musical score signed by Gustav Mahler—Daniel must confront the miraculous, despite his atheism. In doing so, he is given another fateful chance to prove his unconditional love to his family.

A literary thriller of rare depth that sweeps from the morbid trenches of World War I to the terrorist-besieged streets of present-day London, The Blasphemer is about one man coming to grips with his darkest instincts, his moments of betrayal, his shocking family legacy, and ultimately his desperate hope for redemption and faith.