We met Mr. Selek personally in Stone Town and immediately realized that not only was he not an impromptu guide, but he was really a special person. We relied on him for a tour of the city of a couple of hours, in which he explained a lot of things to us in an excellent Italian, and in return he only accepted a coffee.With him we also did the Spice Tour, in which he explained everything about plants and spices, and we relied on him for transport to / from Stone Town to Nungwi.If you want a reliable, attentive, honest and prepared guide on everything (botany, local history and culture), Selek is the right person: you wont regret it.