Managing people isn’t easy thing whatever process you use. With Agile processes putting explicit emphasis on people and interactions it is even more important. Here is a list of essays and articles you may find useful for managing people in the agile realities.
This list is dynamic and is updated frequently.
Also have a look at the other articles tagged with the “team” tag
Also have a look at the other articles tagged with the “customer” tag
Also have a look at the other articles tagged with the “distributed” tag
Also have a look at the other articles tagged with the “adoption” tag