This book is divided between 2 stories, equator making up the bulk of it.
Also, I feel divided.. The science fiction side of these stories feels mostly like set dressing rather than carrying the plot. I think another reviewer mentioned the same thing. Some of the approaches or attitudes to certain topics seem steeped in the ideas of the time, which may come across to some contemporary readers as dated (it was first published in 1958). Also, while it is not anything special, I enjoyed the plot for the first story, but not so much for the second.
However there are some real positives. The world-building is good, especially in segregation, the 2nd story. Also, and I can't quite explain why, but I really enjoy the way Brian Aldiss writes. The dialogue is nice, but I think the prose is really colorful, gripping and brings his stories to life. I loved it and there is a real joy to it.
This is the first book I have read from Brian Aldiss, but I definitely want others in the future. I'm not sure, but maybe some of his later works have ironed out a few of the creases? This feels like an early attempt by an excellent author. Feel free to comment and give your opinion and/or recommend another book by Aldiss.