Boundary crossing by transregional practice of governance to address sustainability issues : M. J. McKinney and S. Johnson, Working Across Boundaries: People, Nature, and Regions. Cambridge, MA, Lincoln Institute of Land Policy, 2009, 176 pp. Paperback, ISBN 978-1-55844-191-0, US$ 25 : M. J. McKinney and S. Johnson, Working Across Boundaries: People, Nature, and Regions. Cambridge, MA, Lincoln Institute of Land Policy, 2009, 176 pp. Paperback, ISBN 978-1-55844-191-0, US$ 25.