It's possible you're thinking of:
* M.A.K. Halliday: This is a well-known linguist and scholar, often simply referred to as "Halliday." He is considered a major figure in systemic functional linguistics. He wrote many influential works, including:
* *Introduction to Functional Grammar*
* *Language as Social Semiotic*
* *On the Language of Literature*
* J.S. Halliday: A less known author, possibly a relative of M.A.K. Halliday, who has written works on historical subjects.
Please provide more context if you can:
* What type of books are you looking for? (fiction, non-fiction, academic, etc.)
* What is the subject matter?
* Do you have any other information about the author?
This will help me identify the correct author and provide more relevant information.