What is the difference between an academic journal and a book?

An academic journal is a periodical publication that features peer-reviewed articles, often focused on specific research topics and intended for a scholarly audience. In contrast, a book is a longer, more comprehensive work that can cover a broader range of topics and may not always undergo the same rigorous peer-review process. Journals typically publish shorter pieces that present new research findings, while books provide in-depth analysis and synthesis of a subject. Additionally, journals are published regularly, whereas books are usually released individually or in less frequent series.