Mission Earth Book L. Ron Hubbard Vol. 7, Voyage Of Vengeance is a vintage science fiction  book, published in 1985 by Bridge Publications. It is part of the Mission Earth book series and is intended for young adults and adults. The book follows the narrative of fiction and is authored by L. Ron Hubbard. It is the seventh volume of the series and is set in the 1980s. The book is a work of science fiction and is based on the topic of science fiction.