The Essence of Evil — Joe Clifford Faust

When merchant captain James May went to the Essence Company to return the stolen phials of the extraordinary product called Shared Knowledge, he needed more than the reward money-he needed the company's help. His copilot Duke had sampled the product, and now the personality of long-dead flyboy "Reckless" Eric Dickson was living in Duke's mind and vying for control of their shared body.

But May underestimated both the Essence Company's desire to get their hands on proof that Shared Knowledge really worked-and Dickson's determination to satisfy his violent xenophobia. Suddenly the lives of Duke and the alien misterbob were at stake-unless James May could find a way to destroy the corporate greedmongers and the enemy within Duke's mind...