If you prefer a physical book with illustrations for your collection, options are available through major retailers: Go to product viewer dialog for this item. Vrihad Vatsayayan Kamsutra

While Project Gutenberg is famous for English texts, they have a growing collection of Sanskrit and Bengali works. Search for "Vatsyayana Bengali" to see if a volunteer has uploaded the translated text.

Sahaj Bangla Sanskaran : Sen, Murarimohan, Tr. : Free Download, Borrow, and Streaming : Internet Archive

Hindu philosophy dictates that life has four main goals: