About the Author

Sandi Metz has 30 years of experience working on projects that survived to grow and change. She writes code every day as a software architect at Duke University, where her team solves real problems for customers who have large object-oriented applications that have been evolving for 15 or more years. She’s committed to getting useful software out the door in extremely practical ways. Practical Object-Oriented Design in Ruby is the distillation of many years of whiteboard drawings and the logical culmination of a lifetime of conversations about OO design. Sandi has spoken at Ruby Nation and several times at Gotham Ruby User’s Conference and lives in Durham, NC.