There is a broad range of works in English Language that can help to prepare you for studying the subject as an undergraduate. You might wish to look at some of the following:
- Introducing English Language: A Resource Book for Students
By Louise Mullany, Peter Stockwell
- The Story of English in 100 Words
By David Crystal.
- Introducing Language in Use: A Course Book, 2nd Edition
By Andrew John Merrison, Aileen Bloomer, Patrick Griffiths, Christopher J. Hall
- Through the Language Glass: Why the world looks different in other languages
By Guy Deutscher
- The Study Skills Handbook
By Stella Cottrell