Here, in one volume, are both an overview and an in-depth research resource about four landmark Supreme Court decisions of 2005 that may affect the day-to-day work of planners. The report corrects much misinformation that has been published about the Kelo decision. Included for each case are an overview, the text of the Supreme Court opinion (including dissenting and concurring opinions), the text of the amicus brief that APA filed, and (for Kelo and Lingle) commentary and reaction. The articles in the commentary and reaction sections, as well as the Foreword and Afterword, describe how these decisions will affect everyday planning practice. The various articles in this report are excerpted from other APA publications and the APA website.