Detail. Precision. Overview. Context. Ease of use.The Zen Human Design Ephemeris has it all.The Zen Human Design Ephemeris is meant for the serious Human Designer who wants to have the big picture and look into the past or the future. No computer program is able to convey the overview and context like a printed ephemeris does.Each volume covers 25 years and shows the positions of all planets in intervals of 12 hours, indexed into hexagrams and lines. Easy to read tables, four months per double page.