Restoring Colorado River Ecosystems: A Troubled Sense of Immensity.ByRobert W Adler. Washington (DC): Island Press. $70.00 (hardcover); $35.00 (paper). xxiii + 311 p; ill.; index. ISBN: 978‐1‐59726‐056‐5 (hc); 978‐1‐59726‐057‐2 (pb). 2007.