100 Reasons Water is Not H2O by Peter Peterson challenges the conventional scientific definition of water as simply H2O. It argues that natural water, with its complex, structured, and isotopic variations (including deuterium), behaves differently from pure, lab-created H2O. The book suggests water is a more complex, unique substance. The book invites a, rethinking of accepted chemical dogma, promoting a view that water is a more nuanced, organized, and distinct substance.