Fascinating, tight, ambitious, though not entirely successful SF novel. Herbert's conceit here is that in the near future, humanity has eliminated most insect life in an apparent effort to increase crop production--to end insect damage etc., one assumes. China has totally eradicated all insects except mutated bees designed to perform necessary functions such as pollination; the Americas are close behind, though apparently the US is resisting. However, in the jungles of South America, a new force seems to be resisting the efforts to eradicate insects. . . . somehow (how is not exactly clear, though it seems to involve some sort of human-insect hybridity that has somehow occurred) an insectoid brain that can think, communicate, and control insects has evolved and is making efforts to save both the insect world and of course the human world form the potential consequences of ecological disaster. There are many fascinating touches here, such as the insects' ability to cluster together to create simulacra of humans or of giant bugs (interestingly, Herbert has characters repeatedly note that how such things could support their own weight is a mystery, without ever providing an answer to said mystery), or Herbert's attempt to depict how an insect intelligence might think--I didn't find this attempt entirely successful, but then, it's a tall order, and Herbert gets points for making a good effort. There are less salutary elements, as well, such as the female entomologist who functions mainly as love interest and damsel in distress, or the inscrutable Oriental who seems determined not to have the truth come out--even though concealment of the truth might well doom humanity. Must have been rather cutting-edge at the time it came out--only four years after Rachel Carson's silent Spring, evidently the inspiration for the "Carsonites" in the book, who resist efforts to change the ecological balance--and still has relevant things to say about the dangers inherent in human interference in complex ecological processes. its literalization of the symbiotic relationship between humans and other creatures is also a nice estranging element. If this book were written today, it would probably be three times as long, so Herbert also gets points for economy. Recommended to fans of thoughtful SF--and to fans of giant bugs.