Rereading this book for the second time, I found it quite different from what I recalled. It was a bit challenging to follow as the story is presented from four or five different viewpoints, and there are significant gaps in the narrative. However, I did learn a great deal about fungus and mushrooms from this book, more than I ever thought I would need to know.
Since it is an "old" book, published in 1968, the "futuristic" science it presents is rather amusing. The author still envisions tube televisions, cameras that require film and developing chemicals, and a lack of distance communication other than radio. Yet, space flight and reaching/colonizing other planets are described as being easily achievable.
Overall, despite its age and some of the outdated scientific concepts, this book offers an interesting and unique perspective on both the natural world and the possibilities of the future.