You may already be aware, but just in case ... The BBC adaptation you watched was the third format - before that there were the books, and before that was the

You may already be aware, but just in case ... The BBC adaptation you watched was the third format - before that there were the books, and before that was the radio show, where Douglas Adams wrote the script often on the same day as the voice actors were due to record it. The radio show precedes the books and, personally, I feel is better. If you want a written version, books of the scripts are available, and well worth getting if you're a fan. Not just for the scripts themselves, but also for the extra info before each episode which provides backstory.