The early stories in this collection showed promise. One of the stories ("The Puff-Ball Menace") is about a species of deadly plant that threatens humanity. Sound familiar? "Derelict of Space" describes a future where space travel is commonplace. People have been on the Moon. (A concept people laughed at in the 1930s.) Mind you, in Wyndham's imagined future, Germany is still ruled by the Nazis. The story "Wanderers in Time" is about a collection of time travellers from different periods who find themselves on a future world where man no longer rules the planet. The Earth belongs to a very different, yet quite common, species.