Synopsis: "In a unique plot - as original as it is weirdly sinister - he tells of the effects of a guinea-pig experiment on the brain of an Earthman, severely injured when his spaceship crash-landed on Mars. With the help of the new wonder metal, niridium, the planet's greatest surgeon effected a trepanning operation on the victim's brain. In doing do he endowed the hitherto shy and diffident Timothy Arnside with the dangerous gift of being able to read the inmost thoughts of his fellow mortals. How the Earthman used and abused that gift is the foundation for a graphically moving story that culminates in a denouement as unexpected as it is spectacular." Vendor blurb