Acknowledgments

The book has been supported by insightful comments from Christine Beardsworth, Allert Bijleveld, Fergus Chadwick, Jan van Gils, Yacob Haddou, Grant Hopcraft, Jana Jeglinski, Paul Johnson, Roger Kirkwood, Freja Larsen, Heather McDevitt, Tom Morrison, Louise Riotte-Lambert and Andrew Seaton. We thank Jeroen Hoekendijk and Gary R. Jensen for their photo contributions. We thank Shane Nackerud for his assistance with the publishing process. John Fieberg received partial salary support from the Minnesota Agricultural Experimental Station.