Monographمونوگراف
A monograph is a scholarly book or a long essay that is written about a single subject or topic. Monographs are typically written by experts in a particular field and are intended for a specialized audience of researchers or scholars. They are often used to present the results of original research or to provide an in-depth analysis of a particular subject. Monographs are typically longer than journal articles and maybe more comprehensive in their coverage of a subject. They are often published by academic presses or other organizations that specialize in publishing scholarly works.