For those of you who aren't familiar with the book, Brooks was the manager of IBM's huge OS/360 project in the 60s. The system eventually shipped, but it was massively overbudget and late. He took the lessons he learned from the debacle, and wrote 'Mythical Man-Month' in 1975.
It's shocking how many of his insights still apply: Adding people slows down projects. Keep teams tight, and structured around your most productive programmers. It often pays to think deeply about a problem before you tackle it. Don't overbuild.
It's true that dynamic programming languages, tools like git, and rapid prototyping have made some of his examples feel dated. However, the underlying principles are still solid.
Hopefully 'The Design of Design' is a similar goldmine. Even if it's only half as good as MMM, it's still earned a slot on my bookshelf.