Which is the best book to clear IELTS?
Managed jointly by the British Council, Cambridge EOSL and IELTS Australia, the IELT examination, held regularly, conforms to the highest international standard of English language assessment and screening.
The Official Cambridge Guide To Ielts Student’s Book
Being the official book recommended for IELTS, this book contains all the necessary questions with correct answers expected from a candidate sitting for this examination.
There is also an attached CD-Rom to help the students about pronunciation and important guidelines for taking the examination.
Best of luck