The Code-Breaker: Book IV of the Nitronian Chronicles - Tapa blanda

Code-Breaker is the fourth book in the Nitronian Chronicles Series where Dr. Paul Brandon, a Nobel Laureate physicist, finds himself with two dilemmas. First, he has had a major heart attack and, now, his damaged heart is failing. Second, he is the only one on Nitron (Earth) who remembers the planet Zonar and it's inhabitants that have helped save his home planet on numerous occasions. To everyone else, he is having hallucinations caused by a nervous breakdown and is bordering on insanity. Is he insane, or could it be yet another alien trap? Paul must find out before his heart gives out. His friends want to help and although well intended, hinder Paul from discovering the truth. As the adventure unfolds, what he finds is beyond anyone's wildest expectations.