There are copies of this book floating around with the author's name
misspelled as 'Green'. Wikipedia's has it as 'Greene':

Joseph Lawrence Greene (1914-1990) was a science fiction editor and author,
best known for his role in creating the Tom Corbett television series and
writing the Dig Allen novels, both space adventures intended for boys. He also
wrote comic books and was an editor for the Grosset publishing house until
1972.

--billbo106