i , ▁where ▁he ▁developed ▁an ▁interest ▁in ▁H ait ian ▁V od ou ▁and ▁the ▁C ul te ▁des ▁Mort es , ▁which ▁were ▁described ▁at ▁length ▁in ▁his ▁book ▁The ▁Magic ▁Island . ▁The ▁book ▁is ▁cred ited ▁with ▁introdu cing ▁the ▁concept ▁of ▁a ▁z omb ie ▁to ▁popular ▁culture . ▁ ▁Se ab ro ok ▁had ▁a ▁lif el ong ▁fasc ination ▁with ▁the ▁occ ult ▁practices ▁of ▁sat an ism ▁and ▁H ait ian ▁V od ou , ▁which ▁he ▁witness ed ▁and ▁described ▁first hand ▁both ▁in ▁Third ▁World ▁countries , ▁as ▁documented ▁in ▁The ▁Magic ▁Island ▁( 1 9 2 9 ), ▁and ▁Jung le ▁W ays ▁( 1 9 3 0 ). ▁ ▁He ▁later ▁concluded ▁that ▁he ▁had ▁seen ▁nothing ▁that ▁did ▁not ▁have ▁a ▁rational ▁scientific ▁explanation , ▁a ▁theory ▁which ▁he ▁detailed ▁in ▁W itch craft : ▁Its ▁Power ▁in ▁the ▁World ▁Today ▁( 1 9 4 0 ). ▁ ▁In ▁Air ▁Advent ure ▁he ▁describes ▁a ▁trip ▁on ▁board ▁a ▁Far man ▁with ▁captain ▁Ren è ▁W auth ier , ▁a ▁f amed ▁pilot , ▁and ▁Mar jor ie ▁Mu ir ▁Wor thing ton , ▁from ▁Paris ▁to ▁Tim bu kt u , ▁where ▁he ▁went ▁to ▁collect ▁a ▁mass ▁of ▁documents ▁from ▁Father ▁Y ac ou ba , ▁a ▁def rock ed ▁mon k ▁who ▁had ▁an ▁extensive ▁collection ▁of ▁rare ▁documents ▁about ▁the ▁obsc ure ▁city ▁at ▁that ▁time ▁admin ister ed ▁by ▁the ▁French ▁as ▁part ▁of ▁French