I have published a series of ten books about English as a Second Language. Each book is about a different aspect of learning English. You can find these book on my Amazon Author page. My author name is William Pitts. The link to the Amazon Author page is here:
I am working on a new series of books about American English accent training, English for Introverts and other topics, so please keep in touch and let me know what books I can write to help you learn English.