It is common opinion that Wittgenstein has two main different periods which are best exemplified by the Tractatus Logico-Philosophicus and the Philosophical Investigations and that these periods are highly contradictory. I remember however that a terrific professor, who was my mentor in political philosophy during college, argued that there is a way to read Wittgenstein as a continuation and not a contradiction.
Unfortunately, I lost contact with this professor, so I would like to know if anyone here is familiarized with this argument and can recommend me a good reference to learn more about it. If you also want to comment on why you think it is possible to understand Wittgenstein's work as a continuum or why it is impossible, it will be great.