Baruch received his doc­tor­ate in physics at the Hebrew Uni­ver­si­ty, and is a lead­ing tech­nol­o­gist in the Israeli high-tech sec­tor. He is co-founder of the Ptil Tekhelet Asso­ci­a­tion, which has restored the ancient bib­li­cal blue dye. Orig­i­nal­ly from New Jer­sey, he lives in Efrat with his wife Judy (co-author of The Rarest Blue) and their sev­en children.