Control stakeholder engagement is a PMI process that covers monitoring and adjusting the stakeholders' engagement in the project.

Related: stakeholder, recognition and rewards

According to the PMBOK, this activity has the following characteristics:

Inputs Tools and Templates Outputs
project management plan, issue log, work performance data, project documents information management systems, expert judgment, meetings work performance information, change requests, project management plan updates, project documents updates, organizational process assets updates

Note: Some books on motivation are listed on the PM Books page.