Ross, Weill, and Robertson look into strategy and how information technology plays a role. In a digital age that places high priority on automated processes it is important to assess how IT is used to enhance strategy execution. Enterprise Architecture as a strategy is a 2006 book that gives strong guidance.
HBS publications tend to have a mixed enjoyment level, Enterprise Architecture as a Strategy is an extremely dense read that reads more as an academic journal. The authors bring many great points that your organization’s strategy is a direct reflection of your enterprise architecture. If your strategy relies on agility then your architecture must be in alignment.
This book is not a treatise on how to design architecture technologically, but on how it should align to business goals. Not a recommended read unless you have a critical need.