The English Center is an Amazon Affiliate. Use these links to order ESL books from Amazon and get them shipped to your home.
American Accent Training: With Online Audio
Ship or Sheep? An Intermediate Pronunciation Course
Grammar for Business: Book with Audio CD
English Grammar in Use Book with Answers: A Self-study Reference and Practice Book for Intermediate Learners of English
Business Vocabulary Builder: The words & phrases you need to succeed / Student’s Book with Audio-CD