Uroš Petrović (Serbian cirilic Урош Петровић) is a Serbian writer (born April 8, 1967, in Gornji Milanovac, Socialist Republic of Serbia within Yugoslavia, now Serbia), best known for his epic fantasy novel Aven (Original title – Aven i jazopas u Zemlji Vauka), Riddle Tales I - V (Original title – Zagonetne priče) serial, Mysteries of Ginkgo Street (Original title – Misterije Ginkove ulice) and the first Serbian horror for children The Fifth Butterfly (Original title – Peti leptir). Dark Secrets of Ginkgo Street is also an innovative form - a novel made of riddles. Awarded for books and photographs. Founder of Mensa World Photo Cup. Co-author of NTC System of learning.