Nonfiction Science Books refer to factual, informative literature focusing on scientific subjects, principles, theories, or experiments. They are a subcategory of Non-Fiction and may also serve as valuable reference materials. These works are written in a manner that caters to both the scientifically inclined and lay readers. They do not include narratives based on fiction or imagination. While this category is mainly concentrated on science, it can also encompass law books, which deal with the principles and regulations established by a government to regulate conduct, as they also rely heavily on factual and referential information.