Hi there everyone,
I discovered recently that a new instructional Haidong Gumdo book has just recently become available in English through the United World Haedong Kumdo Federation.
http://www.haedong-kumdo.org/ The book covers some terminology, history, basic exercises, ssangsoo gumbup, and shimssang gumbup.
For those who are interested:
"Haedong Kumdo - Volume 1" - by Grand Master Edward Jacobson
ISBN # 978-0-620-38112-3
gmeddie@haedongkumdo.co.za-Grant