Vanguard to Venus

1957, sci-fiction book Vanguard to Venus, about a ship stopping off at the Moon where, the jacket flap tells us, the "Venutians" appear:

"An interception was made by the Venutians which promised both treachery and ultimate disaster, a promise which almost became reality."

I haven't read the book, but I'm curious as to see how the Venutians are depicted. Different than the usual benign and wise space brother/space sister Venusians we're familiar with from many contactee encounters. Of course, the contactee stories were non-fiction/biographical events; this book is fiction.