GREEN DOOR is a science fiction mystery novel which has more twists and turns than a Celtic knot.
Henry Mackay is walking his dog along the side of an ancient convent wall. He glances at the peeling paint of the green door as he passes then, a few strides later, stops in his tracks. What green door? He'd never seen it before.
He turns and walks back to the door and all he sees is ivy covering a stone wall. There is no door. Is he hallucinating? Had he eaten too much cheese? Is he day-dreaming? It starts a trail of events which becomes an unbelievable adventure to save humanity.
Tony Harmsworth writes hard, old-style, science fiction with realistic scenarios and as much real science as possible. HIs other books are MINDSLIP and THE VISITOR.