This is from an advance review copy for which I thank the publisher.
In the back of the book, in a section labeled 'Notes for Teachers and Parents', I read in the second paragraph "How do the children think this might have effected the city?" which should have employed 'affected' rather than 'effected'. I'd recommend changing that before any teachers read it! It's much more effective, and not an affectation!
This was an amusingly-illustrated (by Morgan) and informatively-written (by Ganeri and Oxlade) book which discusses the water cycle, without which Earth would be a desert The book discusses, sometimes a bit repetitively, but repetition helps recollection, how water from the oceans evaporates and later precipitates over land as fresh water, which nourishes the soil and eventually flows back to the ocean via rivers, thereby completing the cycle.
The water cycle is a critical part of everyone's need for water, and access is becoming more stressed as the climate change grows worse and the rains come too harshly or not at all, and changing snowfall patterns leave less water to return to the rivers and ocean in spring. Lack of access to sufficient clean fresh water is looming as the number one crisis on our planet. As spoiled Americans each splash through 300 gallons a day in average, the poorer residents of, say, Chennai, in India, which is undergoing an appalling drought in 2019, have less than eight gallons per person per day.
Ava and George the 'geo-detectives' are our guides in this story, and are well-informed. Taking trips on boats and via airplane and even a parachute, and traveling from beach to mountain, they explore not only the cycle, but how water is abused and polluted. Until recently, Cape Town in South Africa was facing a zero water day in the near future: a day when there would be no fresh water for the city's population to use. This scared people so much that they began a serious conservation effort, and now they have put off zero day indefinitely.
There are eleven other major cities across the globe: Bangalore, Beijing, Cairo, Istanbul, Jakarta, London, Mexico, Miami, Moscow, São Paulo, and Tokyo which will face this crisis as well in the very near future if something isn't done - if water isn't valued as highly as it ought to be. This will occur during the lifetime of the children who might read this book, so any effort to educate them as to the vital importance of water is to be commended. This book as a worthy effort in that direction.