A newbook in at Toronto Public Library I spotted
472. Squirrels : the animal answer guide
by Thorington, Richard W.
Johns Hopkins University Press, 2006.
http://www.loc.gov/catdir/toc/ecip063/2005032061.html http://www.loc.gov/catdir/enhancements/fy0664/2005032061-b.html http://www.loc.gov/catdir/enhancements/fy0664/2005032061-d.html and there are no holds on the copies.