The Ratirahasya (also known as the Koka Shastra) is an Indian love manual written by Kokkoka. It is a popular text and is often compared to the Kama Sutra. It was probably written in the 12th century.
Some commentaries have been written on this text.
The Janavashya by Kallarasa is based on the Ratirahasya of Kokkoka. It is written in old Kannada. An edition of it has been published after the study of seven palm-leaf scripts