SPANISH EDITION. Surprising as it may be, there are not many trainers for this type of service. Called to Serve is great not only because it covers the lack of training but also because it comes from the pen of one of the most seasoned and respected business leaders in America. He talks about working in a team and the tensions that arise. From the Back Cover Surprising as it may be, there are not many trainers for this type of service. Called to Serve is great not only because it covers the lack of training but also because it comes from the pen of one of the most seasoned and respected business leaders in America. He talks about working in a team and the tensions that arise.