This textbook fills the gap between the very basic and the highly advanced volumes that are widely available on the subject It offers a concise but comprehensive overview of a number of topics, like general relativity, fission and fusion, which are otherwise only available with much detail in other textbooks Providing a general introduction to the underlying concepts relativity, fission and fusion, fundamental forces , it allows readers to develop an idea of what these two research fields really involve The book uses real world examples to make the subject attractive and encourage the use of mathematical formulae Besides short scientists biographies, diagrams, end of chapter problems and worked solutions are also includedIntended mainly for students of scientific disciplines such as physics and chemistry who want to learn about the subject and or the related techniques, it is also useful to high school teachers wanting to refresh or update their knowledge and to interested non experts