Imagine, if you will...Romila writing a History of Europe from the 15th to the 19th Centuries. The book would be a marvel of fiction, centering on a litany of the ills that the supposedly "high caste" Church imposed on its subjects. The rigid Church hierarchy imposed a strict code, the breaking of which led to being "out casted". Then, along comes a reforming hero, in the shape of Henry the Eighth and takes on the enemy in true cavalier fashion. Meanwhile, according to Thappar, the innovators of the steam engine, of the principles of Industrial Engineering, of sea navigation, of scientific discoveries would be no better than the religious masters. They too subjugate the common people, forcing them to all kind of heinous things like improving production, advancing mobility, creating wealth, etc. The people's response is to fight back! They turn to a reforming and egalitarian Religion called Communism.
On could go on...
The gist is simple: replace the Church with the Bhramins, Henry with any of the Hindu saints, the innovators and inventors with the hard working and civilised people of India, and Communism with the marauding hordes of Ghaznavi, Tughluq, and Babur. And Voila! You have Indian History a la Thappar.
In short, if you want a HEAVY dose of discredited Marxist propaganda, conveniently couched in "pseudo-secularist" babble, take this book or other from the JNU stable seriously! Else, look elsewhere. From the four and five star ratings in this section, it is clear that some misguided college teachers still consider this trash worth using in class. It will take years to undo the damage Thappar and her band have done to Scholarship.
There's plenty of good alternative stuff in the bookshop - seek them out.