Grasse descibes himself on the book's webpage:

"Steven A. Grasse is a cultural studies analyst and media communications expert, who has extensively studied the British Empire. He is also the spokesperson for the International Coalition for British Reparations (ICBR), a massive global initiative for reparations from England worth 58 trillion dollars. . . This is his first book, and given the Brits' thin skins and their adeptness at manipulating history, he will not be surprised if it turns out to be his last." http://www.evilempirebook.com/author.php

I've also seen him described as a "Philadelphia advertising executive" (the Daily Pennsylvanian), who has spent "a lifetime in marketing" (the Daily Mail).

He's probably not the same guy as the Steve Grasse who directed two "Bikini Bandits" movies.