Talislanta is a campaign world (with its own rules) created by Stephan Michael Sechi. The first edition of Talislanta was published way back in 1987.

Since then there have been four more editions of Talislanta, along with a version for the d20 System. The last 5th Edition product was published in 2007.

These are all commercial products, originally sold in printed format. And Stephan Michael Sechi (known to Tal fans as SMS) has authorised the official Talislanta website (Talislanta.com) to make them all available as free to download PDFs.

The Talislanta Library page has download links for them all.