- E-bookThe Goal of Life or, Science and RevelationHiram Butler
- E-bookEl objetivo de la vida (traducido)Hiram Butler
- E-bookO objetivo da vida (traduzido)Hiram Butler
- E-bookLo scopo della vita (tradotto)Hiram Butler
- E-bookLe but de la vie (traduit)Hiram Butler
- E-bookDas Ziel des Lebens (übersetzt)Hiram Butler