Please educate

This is a pretty good read https://www.goodreads.com/book/show/174501.India

This is a bit lighter and not specifically about India, enlightening nonetheless: https://www.goodreads.com/book/show/166434.Empire

Basically, the history of British administration of India can not be summed up by the massacre of Amritsar or the sepoy wars

And if you want a perspective other than imperial apologists and colonial nostalgics, read https://www.goodreads.com/book/show/32618967-an-era-of-darkn... and https://www.goodreads.com/book/show/42972023-the-anarchy

which of the two is John Keay?

Inglorious empire is another good one by Tharoor. Provides letters and statements from British officials and officers to show the intent and exploits.