is ir evrdo is good JEE adv

Yes it is wonderful book for JEE advanced preparation, however this book is at high level of difficulty and you should go after only when you are fully prepared. Moreover, this book has out of scope questions and subjective pattern based questions which is not relevant with JEE patterns.

Some top relevant books  which are much better than IE Irodov who can help you out are:

Physics:-

Concepts of Physics Vol I and II by H.C. Verma

New Pattern JEE Problems: Physics by DC Pandey.

Chmeistry:-

Organic Chemistry by O.P. Tandon

Numerical Chemistry by P.Bahadur

Mathematics:-

Maths XI & XII by R.D. Sharma

You can get some great prepartion tips below:

https://engineering.careers360.com/articles/jee-advanced-preparation-tips-physics-chemistry-and-mathematics

It is good but firstly I would suggest you to go through with NCERT books. Other books you can prefer.

Physics

Concepts of Physics by H. C. Verma

Mathematics Books

IIT-JEE by Tata McGraw Hill publications

Chemistry Books Modern Approach to Chemical Calculations by RC Mukherjee

Chemistry by O.P. Agarwal

Here are some preparation tips you can follow:

1. Know your Syllabus Well: Check on the full syllabus of JEE Main 2018 before laying out your schedule for the upcoming studies. you will be able to know which units and topics are to be studied under each subject.

2. Work on a Time Table: Work towards creating a perfect timetable which will fit your schedule while leaving enough time to prepare for the examination within the days left. Make sure to add short and sweet breaks in between for some relaxation.

3. Make your Basic Concepts Strong: While it is essential to study the topics mentioned in the official syllabus, it is also advised to study the basic concepts well first. By knowing the basic concepts of the units involved in the examination, you will be able to understand each topics well and in depth. This will result in a greater understanding of the topics and will make it simpler for you to study complicated concepts present in the syllabus.

4. Improve your Weak Points: Stressed over some topics or formulas which you just cannot seem to understand? Give more time and focus on these topics to improve it. Keep small notes and constantly revise those concepts which has been hard to understand. By constantly studying the topics you find difficult, you will be able to be well prepared in them for the upcoming examination.

5. Write Notes and Prepare Flash Cards: Notes written in small diaries are highly accessible and you will be able to study from them anywhere anytime. By writing down those complicated theories and formula and revising them, you will be able to remember and understand them more efficiently. Similarly, create flash cards to help you with quick studies and revision.

6. Attempt Mock Test and Solve Sample Papers: Mock tests will give you an almost real experience of how the examination will be. By solving mock tests, you will be able to work on time management while at the same time understanding the question paper pattern. Similarly, sample papers will let you practically apply all of the topics you have been studying till now. Preparation using mock test and sample papers will let you know how much syllabus you have covered and where you will need to work to improve.

Are you asking for Irodov book for JEE Advanced preparation?

If you want to start your preparation to clear your concepts then it is not good book to start. It contains questions for higher level. Basically it is a question bank.

If you want to build your concepts the you should go for HC Verma and after clearing your concepts you can go for Irodov for your practice.

It is recommended that you should go for HC Verma, then DC pandey and at last for Irodov.

Good Luck!!

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