Hi there,

Hope you are fine.

There are a lot of resources which are available which can help you in finding and study for the jee examination.

To get the important chapters you can visit the official website of the nta and then check the syllabus and then accordingly read the study material if uploaded on the website.

You can also take help from the online educational platforms like the coursera, edx and many more to  further study.

To get an ebook you must visit the online book sites like amazon kindle to help you get the perfect study material for the same.

Also, you can study the various coaching institutes study materials which are of immense help in preparing you for the examination.

At last, whichever resource you choose to study from sure that it is trusted and well written and suggested by the experts to get a good understanding of the topic and the desired subject.

Hope this resolves your query.