Career
He is best known for his popular book Magische Gifte: Rauschund Betäubungsmittel der Neuen Welt ("Magic Poisons: Inebriating and Narcotic Substances of the New World"), first published in 1936. Reko"s book also covered the following drugs, many of which were not mentioned in the earlier book Phantastica by Louis Lewin: sinicuichi (Heimia spp) for which he falsely claimed psychoactivity, Ololiúqui (Turbina corymbosa), peyotl (Lophophora williamsii), marihuana (Cannabis sativa), toloachi (Datura stramonium var tatula), ayahuasca, colorines (Erythrina and Sophora species), coztic-zapote (Pouteria campechiana), xomil-xihuite (Gelsemium sempervirens), camotillo (Dioscorea composita), and cohombrillo (Ecballium elaterium). The second edition also contained chicalote (supposedly obtained from a cross between Argemone mexicana and Papaver somniferum), minapatli (Sebastiania pavoniana, Mexican jumping bean), and herbas locas (Dioon edule, Astragalus amphyoxys, and Oxytropis lambertii).
