The Goodreads' scale falls apart when you encounter a book that you admire, but which you didn't 'like' a great deal. This is one of those books; I found it an excellent critical introduction to postcolonialism, but rather a hefty read.
Divided into only three chapters, Loomba offers an analysis of the history and development of colonialism, the establishment of colonial identities, and challenges to colonialism -- including a conclusion that responds to recent historical developments roughly after the invasion of Iraq in 2003. The lack of major division leaves her able to dive into each topic with considerable depth, with room to draw in the major critical voices in this area and have them engage in broad arguments; it also has the effect of making the book occasionally difficult to orientate oneself within, and to get 'above' the discussion. Frequently, the arguments turn around on each other, so that a discussion about something is critiqued, which is itself the subject of criticism and then new insights are brought in etc. This is perhaps the only way that Loomba can tackle an unwieldy topic like this, whilst also ensuring none of the systematic biases and prejudices that can so easily creep in, but it's also taxing. Nevetheless, I feel after having read this a much greater understanding of the topic, which is perhaps the only criterion by which an Introduction text can be judged.