A brilliant chemist, Denise Markham, is murdered at a university in Miami. Detective John Conway discovers she developed a drug that enhances psychic ability and was administering it to friends who bankrolled her research. The killer is now stalking Laura Perkins, the only witness to the murder, a professor with whom Conway falls in love.
Used availability for T J MacGregor's In Shadow
November 1985 : USA Mass Market Paperback
April 2014 : USA, Australia, Canada, UK Kindle edition