Hey Tanmoyee,

As of now, there are no such books with exact IPM difficulty level questions. But "Pearson's guide to IIM Indore" is the most recommended one. So as far as the aptitude test is concerned, buy the Pearson book for the exam. Focus on quant and verbal 2–3 weeks before the exam. Give more time to quant as it can sometimes get tricky, solve past papers and mocks when you’re done with the book. You cnnot completely depend on any of the sources as even the sample papers issued by iim i itself are not in par with the actual questions.

Good Luck.