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Rainbow Society created Boibagan to support poor students. Boibagan is actually a free digital library. There are many talented students in Katwa and its surrounding areas who are not able to pursue their studies only due to financial reasons. Underprivileged students will get books of different categories of secondary, higher secondary, graduation, and post-graduation levels from the digital library. The method of collecting books from this library is slightly different. To collect books from this library, the students have to apply for the book with the full information of the applicant with the name of the required book in the Google sheet given on the Facebook page of Bengal Help Club. Then the Bengal Help Club members will hand over the book to the applicant according to the application. Every 15 days, the list of books will be published on the Facebook page of the Bengal Help Club so that the students can see the list of books and apply for the books they need. Students do not have to pay any fee to collect books from this digital library. The organization collects old books from the works of different people to help the students, and any kind person can donate their old books to this organization. Gouranga Roy, a member of the organization, appealed to donate old books to the book garden to help poor students in their studies. Dr. Gautam Nandi, Professor of the Chemistry Department of Katwa College applauded this initiative of Rainbow Society.