The book "Mathematical Methods for Engineers and Geoscientists" offers a comprehensive introduction to mathematical methods that are relevant for engineers and geoscientists. It begins with an engaging mathematical puzzle and covers fundamental concepts necessary for understanding complex mathematical structures and their applications. The author addresses the widespread issues of innumeracy and math avoidance that exist in society and the education system, shedding light on the causes and consequences of these phenomena. Through discussions on the correct application of mathematical methods, the reader is encouraged to use the power of mathematics responsibly. The book is written in English and is aimed at a broad audience interested in engaging with mathematical concepts, regardless of their background.