The writing test is the third test you do on the test day. You have 60 minutes for this test. There are two tasks or parts to do. You will be given a card with the two tasks – one task on each side of the card.
The language needed for writing about visuals such as graphs and tables is quite complex in English.
These two e-book contains lots of examples of IELTS Writing task 2.
IELTS Preparation and Practice, Reading and Writing – Academic Module (Writing part only included)
by Oxford University Press
Building upon my experience as an IELTS writing teacher and professional writer, I collected abundant writing materials authentic from test centers and other media.