His name is prot Nobody knows where he's from, but everyone wants to go there 'On a beam of light' is the sequel to 'K-Pax', in which a man called 'prot' claims he is from a perfect world without wars, government or religion At the Manhattan Institute his psychiatrist is determined to prove that prot's identity is nothing more than a tragic case of multiple-personality disorder But with prot's peculia characteristics many doubt the diagnosis This time when he leaves Earth, he intends to take some beings back with him to K-Pax, and many of the patients are only too keen to go