Integrated Reasoning (IR) Mega thread

Dear GMAT Aspirants,

Here is the Integrated Reasoning (IR) Mega Thread 2020 edition. IR section is important for MBA candidacy evaluation and business schools do consider IR score. In this thread I will add maximum resources to prepare IR section of GMAT. You can find concepts building posts, practice questions, IR E-books from different prep companies and Top IR post by Kudos.

Thanks to Bunuel who take this initiative in 2012 to post IR Mega thread for the first time, you can find that post here. Why I am posting this thread? The reason is that its 8 years now and a lot of resources expired and links given in the old thread are now broken. This post will includes some of the older resources but a lot of fresh and new resources. Any question, suggestions and feedback are welcome.