The MERLIN catalog lists a wealth of language learning materials. A general subject search for "Chinese Language" will retrieve hundreds of books. To see what is available in electronic format, click on Limit, and choose Ebook as the Material Type.
Add the following sub-headings after Chinese Language to get more specific results:
- Composition and Exercises
- Conversation and Phrase Books
- Errors of Usage
- Study and Teaching
- Terms and Phrases