Zips, Pipes, And Pens J. David Truby GS111721 US$ 29.95 Pref. Cust. Discount 0% Ingenious and very deadly improvised weapons collected from prisons, police departments and third world countries. 5 1/2 X 8 1/2, softcover, photos, illus, 160pp. ISBN 0-87364-702-5