Kosambi's historiography is a bit outdated, but his perspective is insightful and somewhat balanced.
The book ascribes to Aryan Invasion Theory, which has since been debunked. There are also hints of an anti-India colonial narrative, which Kosambi does well to temper but nevertheless surfaces on occasion. For example, he characterizes the Arthashastra as an amoral, if not immoral, political treatise, when in fact the text is strongly normative, setting it apart from both The Prince and The Art of War.