Book formats refer to the different ways in which books can be presented and consumed. The most common formats include hardcover, paperback, and eBook. Hardcover books are sturdy and often come with a protective cover, making them ideal for collectors. Paperbacks are lighter and more affordable, making them popular for casual readers. In recent years, eBooks have gained popularity due to their convenience and portability. Readers can access thousands of titles on devices like tablets and eReaders, allowing for easy reading on the go. Each format offers unique benefits, catering to different preferences and lifestyles.