Essential Jo, the DVD, covers the same ground as the book, along with some very useful bonus material, notably a detailed analysis of "Jusan" - the 13 count form - both in single person and two person form.
The jo - the Japanese 4-foot staff - was originally taught with the ken (sword) in the samurai arts.
While it is intended primarily for students with experience in weapons arts, particularly jodo, the book can also be used by beginners for home study.
The art of jodo makes an excellent addition to any martial art system.
(Also direct download from Amazon - USA only)