Authentic examination papers from Cambridge Assessment English provide perfect practice because they are EXACTLY like the real test.

Inside IELTS 14 Academic with Answers (without audio) you'll find FOUR complete examination papers plus details of the different parts of the test and the scoring system, so you familiarise yourself with the test format and practise your exam technique. This book comes with answers, tape scripts and sample writing answers. This book does not contain the audio recordings. A Student's Book with Answers with Audio is sold separately and includes all the material for the Listening tests.

https://www.cambridge.org/th/cambridgeenglish/catalog/cambridge-english-exams-ielts/ielts-14/ielts-14-authentic-practice-tests-academic-students-book-answers-without-audio?isbn=9781108717779&format=PB