Another angle: "Kobita Bitan" could be a resource for teaching or learning Bengali poetry. In many educational contexts, poems are compiled for students. So there might be a PDF version of such a compilation for easy access. I can look for educational websites or online libraries that offer Bengali poetry as PDF downloads.
I should also consider possible errors in the query. Maybe the user meant "Kobita Baitan PDF" or "Kobita Bitan eBook"? A slight spelling error could be causing confusion. Checking alternative spellings might help. For instance, searching for "Kobita Baitan PDF" could lead to different results. Kobita Bitan Pdf
Additionally, I can look into online platforms like Google Books, Academia.edu, or educational websites like Bangla.bd, which might have such a collection. There's also the possibility of it being a self-published book, so checking sites like Smashwords or SmashPub could be useful. Another angle: "Kobita Bitan" could be a resource