For centuries up to the present day missionaries have traveled to newly "discovered" lands to convert the indigenous population to Christianity. What would happen if a civilization on a planet several light years away "discovered" the planet of Earth and decided to send missionaries to Earth to convert humans to the interplanetary faith?
COMING SOON: A new science fiction book titled Missionaries to Earth deals with this question. The manuscript has been submitted to a national agent in hopes the book can be published in 2021.
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