If you liked Cadillac Desert you might enjoy reading A Kingdom from Dust, a long-form article in California Sunday magazine that details the Resnick family behind Pom pomegranate products and their lobbying for water rights in Kern county: https://story.californiasunday.com/resnick-a-kingdom-from-du...
Mark Arax, the author of that article has a longer book, A Dreamt Land, on the subject of California agriculture and water, (probably the article is an excerpt) that is a really good read too. A little more up-to-date than Cadillac Desert, and more focused on California and the Central Valley.