Book cover titled 'Murder on the Rhine' by D.R. Becker. Features a man walking on a rainy cobblestone street at night with lit street lamps, bicycles, and historic buildings along a river. A church tower is visible in the background.

Murder on the Rhine


A trail of clues. A centuries-old secret. A killer who’s already one step ahead.

Coming Soon

A river cruise. A hidden trail. A secret someone has killed to protect.

When Jack Callahan, his wife Bree, and their longtime friends board the Viking Eir , they expect castles, wine country, and two relaxing weeks along the Rhine.

Instead, a series of cryptic clues pulls them into a mystery stretching back generations. As the journey carries them from one historic city to the next, the trail grows more dangerous—and it becomes clear that someone is determined to make sure the truth never reaches the end of the journey.

Murder on the Rhine is the first novel in the Callahan & Harrington series.