This document discusses factors to consider when evaluating books for research purposes, such as date of publication, author's credentials, publisher reputation, sources cited, and writing style. It also provides guidance on citing books in MLA format, with the core elements being author name, book title, publication city, publisher, and year/medium. Key criteria for evaluating sources include relevance of publication date to research topic, author expertise, publisher intent/reputation, and quality of research/references included.