Collins English for Exams Grammar for IELTS There are a great number of resources available for IELTS preparation and teaching English grammar. If you are interested in improving your knowledge of English grammar and boosting your score on the IELTS test, Collins Grammar for IELTS is the book you need. A very popular series by Collins for IELTS prep, this book is part of the series. Throughout this book, you will find grammatical instructions for all 4 parts of the test. The book includes audio files associated with 20 4-page lessons. Learners of English who are at CEF level B1 or applicants with an IELTS score of 5 or 5.5 and who are aiming for a higher score should find this book useful.