This book “12 CIO Personas: The Digital CIO’s Situational Leadership Practices” is the extensive brainstorming and logical content expansion of my book “CIO Master: Unleash the Digital Potential of IT,” to reimagine and reinvent CIO leadership via practicing multitudes of digital influence. -Chief Information Officer: Back to basic, CIOs are “Chief Information Officers,” who take charge of one of the most invaluable business assets - information. -Chief Innovation Officer: Ideally, CIOs are “Chief Innovation Officers” who are expected to constantly propose new ideas and challenge the status quo. -Chief Insight Officer: Go deeper, CIOs are “Chief Insight Officers,” who can provide information-based insightful advice for business executive peers and lead profoundly. -Chief Improvement Officer: In practice, CIOs are “Chief Improvement Officers” who lead IT to continue optimizing business capability and improving organizational maturity. -Chief Instrument Officer: Technology is the linchpin of the emergent digital ecosystem, and CIOs play an instrumental role in chartering digital paradigm shift seamlessly. -Chief Interpretation Officer: CIOs are fluent in both business language and IT terminology to ensure cross-functional communication without “lost in translation.” -Chief Inspection Officer: CIOs should do periodic IT management quality checks to ensure its effectiveness, efficiency, performance, and maturity. -Chief Interaction Officer: CIOs need to be far more diplomatic and build solid business relationships across the digital ecosystem. -Chief Intrapreneur Officer: CIOs are able to run IT as a software startup and the business in the business. -Chief Investment Officer: IT investment in the business can often become the decisive factor to run a high-performance organization with the long-term perspective. -Chief Integration Officer: CIOs need to reinvent IT as the linchpin to bridge IT-business gaps and strengthen the weakest links to catalyze digital transformation. -Chief Influence Officer: Digital CIOs today must develop their leadership competency to make multidimensional influence across the organization and the digital ecosystem. Besides above mentioned, digital CIOs even have more enriched personas such as “Chief Inquisitive Officer,” “Chief Inclusiveness Officer,” “Chief Initiative officer,” “Chief Interface Officer,” “Chief Imagination Officer,” “Chief Intelligence Officer,” “Chief Investigation Officer,” and “Chief Inspiration Officer,” etc.