Which book is not written by munshi premchand rangbhhomi vishkanya kayakalp?

Here's why:

* Kayakalp is a novel written by Sharat Chandra Chattopadhyay, a renowned Bengali writer.

* Rangbhumi and Vishkanya are indeed novels written by Munshi Premchand.

Therefore, the correct answer to your question is Kayakalp.