This book offers an overview of mold in our living environment. The subject is vast, with an estimated over 1.5 million species of mold. As individuals in our climate zone spend more than 80% of their time indoors, this book focuses on the indoor climate and the mold species that proliferate and develop within it. The indoor climate is also more readily controllable and influenceable, given that the interior of buildings is isolated from the external environment. The author’s objective is to impart greater understanding regarding the nature, development, and particularly the growth conditions of mold within buildings. Leveraging this knowledge, we can, when necessary, reduce the prevalence of mold particles and manage the spread of various species.     
The creation of this book involved the expertise of specialists from numerous fields. Microbiologists, construction engineers, healthcare professionals, and researchers from various other disciplines have all contributed their insights. However, the book’s content is predominantly focused on construction-related themes, as the growth conditions for mold in indoor environments are directly influenced by building properties and usage. While identifying the mold species is useful, analyzing and preventing the causes of its spread is even more critical. Knowledge in building physics provides a clearer understanding of how to influence the developmental environment of mold.    
“Mold: Explained in Plain Terms” is primarily aimed at users of residential buildings, office buildings, educational institutions, public buildings, and other structures, irrespective of age, gender, profession, or educational level. The book is written in an accessible style for everyone, employing the ‘explained in plain terms’ approach. Complex concepts and formulas are elucidated and enhanced with examples drawn from the author’s experience. By reading this book and adhering to its advice, one can significantly improve their living environment and, consequently, extend their years of healthy living.