«The Key to Logic» by Professor Adham al-Asmi. This is foundational book that provides an important entry into logic. With a brief collection of the origins of logic, and a brief of the contemporary phrase, and a summary of studies from the most important books in the science of logic. An important reference book, with basic rules essential for every studen, and indispensable for the novice in learning the science of logic, and others as foundation for teaching.