Tamil Marunthukal is a valuable book for those interested in Siddha medicine. The book is written in the Tamil language by Late கி ஆ பெ விசுவநாதம், a well-known figure in Tamilnadu. The government of Tamilnadu has nationalized the book to provide everyone access to it. The book has been reproduced without any changes, except for an index for easy access through a database.

The book covers 99 remedies for common ailments, which are known to the ladies of the house. These remedies can be used by members of the family and are a comprehensive guide to Siddha medicine. The book is an excellent resource for those who want to learn more about traditional medicine practices in Tamilnadu.