Is information given in both imperial and metric units?

Yes, all information is given in both imperial and metric units which is one of the many things that makes this e-book unique. The only exception being the draw weight of the bows. It has become tradition to announce draw weight and draw length of bows in imperial units. Draw weight is announced in pounds. One pound equals 0.454 kilograms which is a little less than 1/2 kilogram.