- Academics and professionals taking the IELTS (International Language Testing System) to validate their proficiency in English will find everything they need for success in Barron"s 3-books-in-1 IELTS Superpack. This comprehensive package provides test takers with an overview of the IELTS, a total of 10 full-length practice tests with answers, and intensive help with specialized areas of English language vocabulary that they will encounter on the exam.