A miracle is an event not explicable by natural or scientific laws. Such an event may be attributed to a supernatural being (a deity), magic, a miracle worker, a saint or a religious leader. Informally, the word "miracle" is often used to characterize any beneficial event that is statistically unlikely but not contrary to the laws of nature, such as surviving a natural disaster, or simply a "wonderful" occurrence, regardless of likelihood, such as a birth. Other such miracles might be: survival of an illness diagnosed as terminal, escaping a life-threatening situation or 'beating the odds'. Some coincidences may be seen as miracles. Theologians say that, with divine providence, God regularly works through created nature yet is free to work without, above, or against it as well. A true miracle would, by definition, be a non-natural phenomenon, leading many rational and scientific thinkers to dismiss them as physically impossible (that is, requiring violation of established laws of physics within their domain of validity) or impossible to confirm by their nature (because all possible physical mechanisms can never be ruled out). The former position is expressed for instance by Thomas Jefferson and the latter by the celebrated philosopher David Hume. This book discusses Signumology - The Objective Study of Miracles. The reader might be interested in our book on Neurotheology as an interesting new field in the study of such phenomenon. This book is designed to be a state of the art, superb academic reference work and provide an overview of the topic and give the reader a structured knowledge to familiarize yourself with the topic at the most affordable price possible. The accuracy and knowledge is of an international viewpoint as the edited articles represent the inputs of many knowledgeable individuals and some of the most current knowledge on the topic, based on the date of publication.