In 1961, Sekelj accepted the invitation of Moroccan Esperantists and traveled to Morocco, where he joined a caravan of Tuaregs nomads into the Sahara. In March 1962, Tibor set off for Africa on a Karavano de Amikeco (Caravan of Friendship), with eight people from four countries in two all-terrain cars. With a goal of direct communication between people, this yearlong journey reached Egypt, Sudan, Ethiopia, Somalia, Kenya and Tanzania. When a second caravan meant for other African countries failed to materialize, Tibor climbed Mount Kilimanjaro, the highest peak in Africa. This trip is the theme of his book Ĝambo rafiki. Although he wrote the book in Esperanto, it first appeared in the Slovenian language.