Es una novela de invasión alienígena, sobre seres no humanos que aterrizan en la Tierra con la intención de conquistarla. Es la historia de cómo respondemos a la amenaza. El héroe de la historia es Lockley, quien sospecha que los traidores humanos pueden estar involucrados en el ataque alienígena y desarrolla un dispositivo portátil que desvía los rayos de terror alienígena en circunstancias sorprendentes e imprevistas.

Murray Leinster is one of the old men of SF. He had a long and successful carreer in the pulp magazines and novels.

I always like his work as examples of what "Classic SF" was all about. He spends little or no time discussing the technicalities of space travel and planet colonization. He write stories about what life may be like when we finally do it.

This is a near future, Earth bound novel. It is not his usual fair but professionally told as always. I just didn't like the direction of the story nor the ending. Still, I will read everything he writes as he is a master of the "Classic SF" genre. ( )

I listened to Mark Nelson's reading for librivox. He's a good reader, but I may have missed a few lines in a few spots.

This is exactly what one can expect from a short novel of classic pulp SF. Plenty of adventure and thought-provoking ideas, but not meant to be savored by the literati. Ideas of science, technology, sociology, psychology, and politics were all explored, but naively & simplistically.

I did enjoy it, and would have done so in a paper version, too - but I cannot quite recommend it. ( )

A surprisingly weak work from a usually reliable pro. The tale of a (perhaps) alien invasion of Colorado and the search to find the secret behind it and the invaders’ super weapon. The protagonists spend so much time trooping through the woods you may think that you are reading Last of the Mohicans. The low rating does not apply to the Librivox reader Mark Nelson who does a good job. ( )