 Kosemen's 2019 book "The Disappearing City", explores and collects photographs of 20th century Turkish street signs and architecture in Istanbul.Describing the book, Kosemen has stated that it came about since Istanbul is rapidly replacing its 20th century buildings and that the city as such is "losing some valuable buildings of a type that are being preserved in, say, Tel Aviv".Kosemen is also known for his "Snaiad" speculative evolution project, which explores a fictional alien world called Snaiad, with a diverse ecosystem of creatures designed by Kosemen himself.