Working Effectively with Legacy Code by Michael Feathers

Nice classic book, which I glanced through long time ago, but dealing extensively with 9-year old code base made reading it again much more insightful.
A lot of useful patterns to break down nasty 600 lines methods and copy-pasted classes. Java examples will not stop C# developers from fully understanding the ideas but C++ examples are not that easy to grasp – in my opinion most of the techniques deal with limitations of the language and patterns so they don’t seem that universal.