A classical work in a second edition, that also answers the most common critique. Absolutely interesting, but not easy reading.

Also, please be aware that this book addresses culture's effect on/by an organization! It is not trying to be the end-all of all cultural studies.

Another warning, is that this is in reality an academic book, with lots of references, statistics, references to studies etc. But if you're interested in culture and organisations, you should definitely read this, regardless on your opinions on Hofstede, as it is one of the most referenced books in the subject.