Cultures throughout Europe believed there was once a gospel written in Christs own hand, a treasure of almost unimaginable magnitude. It was referred to by the Cathar culture in France, who claimed to be direct descendants of Christ, as The Book of Love. But the teachings in The Book of Love were radical and contrary to the political agenda of the Church. Papal forces launched one of the bloodiest crusades in history against the Cathars in an effort to wipe out their heresy - and to gain possession of the original, incendiary manuscript - a document so revolutionary that its contents would be considered ground-breaking and visionary 2000 years later. In The Book of Love, Maureen Paschal continues her journey of discovery begun in The Expected One, following evidence in stone and stained glass, clues left 800 years ago by the ancient architects of the great Gothic cathedrals of Europe. As Maureen and her team get closer to the truth, they find themselves locked in the most ancient human struggle - the epic battle between good and evil.