The "국민도서관 책꽂이 부카우터" extension for Chrome is a useful tool for anyone who enjoys browsing books on online bookstores. This extension provides the convenience of instantly knowing whether a desired book is available in the National Library of Korea's collection.

The National Library of Korea's collection, known as "국민도서관 책꽂이," is an online shared library based on the philosophy of the sharing economy. It offers a safe storage space for book owners and utilizes the gathered books as resources for a library service. This allows anyone, from anywhere in the country, to easily borrow books through a convenient delivery service.

With over 167,000 books available as of November 2020, the National Library of Korea's collection boasts a rich selection that surpasses the average number of books found in public libraries in Seoul by three times. Furthermore, the advantage of being able to borrow up to 15 books for free for 60 days per rental has garnered a loyal fan base among users.

Saving money is a virtue, and since it may be impractical to buy and read all the books we desire, the "국민도서관 책꽂이 부카우터" extension makes it easy to check if a book is available in the National Library of Korea's collection and borrow it for reading.

Currently at version 1.0.0, the extension is expected to undergo continuous improvement in the future.