Workflow Management Coalition published every year one book in a workflow handbook series. It often contains interesting case studies and hints about the future. In 2011, the book does not contain any interesting insights relevant directly to healthcare since the 2011 book focuses on social networks and workflow.
See for yourself:
http://www.futstrat.com/books/handbook11-links.php
TOC: http://www.futstrat.com/books/downloads/Introduction2011_preview.pdf
Healthcare Workflow 