Another book query. I can't find any info on this title-

The Rape Of Mr. Brown
Emanuel Francis Cefai
1979
Gozo Press
Softback

It's a strange science fiction novel with racial elements.

"The first man that came to our earth came from another planetary system hundreds of thousands of years ago. Some thousands of years later he was joined by another man from yet another different planet, hence our different races. The white man and the yellow man. The coloured man came to us much later and in a totally different way, and this is the story of how it might have happened..."

Book is inscribed to "Betty and Ken" and signed by author, August 1979.

Anyone heard of it before?