Best Business Books (Recommendations included)

I've just finished reading "Hard Drive" a book written by James Wallace and Jim Erickson (Jun 1, 1993) about the early days of Microsoft and it's founder Bill Gates. I have to say that it was a fantastic read and certainly one of my favourite business books of all time.

As a self-proclaimed omnivorous reader that says a lot and I've got to admit the bar is set high after this one so finding a great follow-up read is difficult.

So, with that said - what is a business book that you thoroughly enjoyed and would recommend as a "must-read!"

Cheers!