A book club, also referred to as a reading group, is a collection of readers who participate in the regular discussion of books. Traditionally, a book club consists of several members who meet in person each month to talk about a specific work.

However, the advent of web forums and email has made it possible for book clubs to exist online. While both traditional and online book clubs offer readers the opportunity to participate in spirited discussions, each type has its own set of advantages.

Traditional book clubs offer the benefit of having all members in the same room, which makes for a much more personal and intimate experience. Since most traditional book clubs are somewhat small in size, each member typically has more control over what books are selected to read (often members will vote on a list of suggested titles that have been submitted or take turns selecting). At the same time, it is often difficult to organize and maintain a book club that meets regularly. In addition to the challenge of recruiting quality members for a book club, a regular meeting time and place may be difficult to establish, especially if members have busy schedules. Also, the small size of the traditional book club typically limits the diversity of views and perspectives that enter into the discussion.