He is best known for his unusual novels, 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 and Marta's Great Mysterious Adventure are also an innovative form - novels made of riddles. Petrovic spurred the nation to think in the “Labyrinth” quiz as the Creator of the Labyrinth character and the most serious obstacle for competitors, broadcast by Radio Television of Serbia.
He is best known for his distinctive novels, 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 and Marta's Great Mysterious Adventure are also an innovative form - novels made of riddles. Petrovic spurred the nation to think in the “Labyrinth” quiz as the Creator of the Labyrinth character and the most serious obstacle for competitors, broadcast by Radio Television of Serbia.