Learn the first lesson of the above book well. Focus specifically on the sections related to Task 1 or Task 2 according to your plan. In many cases, the order of the lessons is important, as the initial lessons serve as prerequisites for the subsequent ones.
The book is considered as the best resource for several reasons: it is concise, totaling only 112 pages, it offers plenty of exercises, includes an answer key, and contains useful practical content.
However, there are areas that could be improved: the exercises at the end of each lesson are not diverse enough, and in some cases, the order of the exercises could be better adjusted.
Hint #2
Hint #3
Introducing "Improve your IELTS Reading" by Sam McCarter