Which last book is written by mahatma jyotiba phule?

It's difficult to definitively say which book was the *last* written by Mahatma Jyotiba Phule because his exact chronology of writings is not entirely clear. However, some scholars believe that his last major work was "Shetkarachi Atmakatha" (The Autobiography of a Peasant), which was published posthumously in 1931.

It's important to note that:

* There is no concrete evidence to definitively confirm the exact date of its composition.

* There might be other minor writings or speeches that could have been written later.

However, "Shetkarachi Atmakatha" is considered a significant work that reflects Phule's later thoughts and experiences. It offers valuable insights into his life, struggles, and social reform efforts.