Object-oriented reengineering patterns

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1. cratermoonAug 2022
   Definitely get a copy of Working Effectively With Legacy Code, by Michael C. Feathers. Indispensable. Second, and more aimed at the project/product management level is Kill It With Fire: Manage Aging Computer Systems (and Future Proof Modern Ones) from Marianne Bellotti. Older, but still worth a look in some cases, is Object-Oriented Reengineering Patterns, 2008, by Demeyer, Ducasse, and Nierstrasz.

   And finally, at the code level, it's absolutely essential to have a copy of Martin Fowler's Refactoring: Improving the Design of Existing Code handy. Yes, many tools have automated the mechanics of refactoring, but knowing when and how to use them needs this book.

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2. vincenvDec 2017
   "Object-Oriented Reengineering Patterns" has some good advice on how to approach a legacy system and rewrite parts of it, pdf available from the authors website:

   http://scg.unibe.ch/download/oorp/

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