People screamed. People sprang off the pavement. "the Invisible man is coming ! The invisible man.... This classic science-fiction book is a spine-tingling thriller that will leave you breathless. The invisible man is a young scientist who theorises that if a person's refractive index is changed to exactly that of air and his body does not absorb or reflect light, then he will be invisible. He successfully carried out this procedure on himself but cannot become visible again.