Mintzberg is always fun to read, but I should recommend Strategy Safari instead, if you want an overview of different types of strategy.

The interesting thing with this book, is that a lot of people claim that Mintzberg predicts the end of the strategist! Those who do, haven't read the book, as Mintzberg differentiates between different types of "strategists/planners" and shows where thse have a useful role to play in different contexts.

Really recommended reading, but not as your first book on strategy.