Dilbert and the way of the weasel by Scott Adams
There’s more good advice about running a business in here than there is in most ‘proper’ business books.

Peopleware by Tom Demarco and Timothy Lister
If you read one book about creating and managing software teams, this should be it.

The mythical man month by Fred Brooks
A classic.

The psychology of computer programming by Gerald Weinberg
Athough this book is 35 years old, it’s still a worthwhile read, with interesting chapters on topics such as computer programming as a social activity.

Facts and fallacies about software development by Robert L Glass
The title says it all. An excellent book

In search of stupidity: Over 20 years of high-tech marketing disasters by Rick Chapman
Covers, among other things, the mistakes that Netscape and many other of Microsoft’s competitors made.

Information rules