The KKC's 'Dojo Manual' (4th Ed.) by S.Quinlan. This book gives information on basic formalities and equipment, to more advanced topics like waza, concepts and theory, shiai (competitions) and the nihon kendo no kata. 274 pages, available as B&W soft-cover & hardcover, colour hardcover, and colour eBook (.pdf).
Bound & electronic copies may be purchased here.