Publication Types:

A Linguistic Study on the Dialogue Language of Modern Sinhala Novels (Based on novels that won State Literary Awards from 2002 to 2015)

Books
Piyarthna, P.I
A Linguistic Study on the Dialogue Language of Modern Sinhala Novels (Based on novels that won State Literary Awards from 2002 to 2015), (Unpublished).
Publication year: 2016

Lama Sahitya Nirmana Vimarshana (ළමා සාහිත්‍ය නිර්මාණ විමර්ශන )

Books
Piyarthna, P.I
Lama Sahitya Nirmana Vimarshana (ළමා සාහිත්‍ය නිර්මාණ විමර්ශන ) Department of Cultural Affairs: Battaramulla. (Winning scholarly work from the Manuscript Competition Conducted by the Department of Cultural Affairs /  Approved as a school library book by the Educational Publications Advisory Board)
Publication year: 2018

Mathaka Mal Pasa (මතක මල් පැස)

Books
Piyarthna, P.I
Mathaka Mal Pasa (මතක මල් පැස) , Graphicare Publications: Rajagiriya. ( Awarded the Most Outstanding Youth Literature Work at the Bauddhaloka Literary Festival / Approved as a school library book by the Educational Publications Advisory Board.)
Publication year: 2024