You can find the official audiobook narrated in Malayalam across several major platforms: : Offers a high-quality production of the classic.
For those looking for a free version, YouTube is a treasure trove. Several channels have uploaded the audiobook in parts. Search for "Khasakkinte Ithihasam Full Audiobook" or "OV Vijayan Audiobook." Be cautious of AI-generated voices here ; look for human narration. Often, you will find vintage recordings of radio broadcasts from All India Radio (AIR) featuring legendary artists. khasakkinte ithihasam audiobook
If you want, I can: