So as per my research, there is a train that goes from Tbilisi to Baku. I want to book the ticket online from Tbilisi to Baku. So I came across this website http://www.railway.ge/ which seems to be their official website for booking. But the issue here is that, I cant find city name "Baku" option at the destination dropdown on the page. Although this page says that there is this international train that goes from Tbilisi to Baku.
How would I book online? any suggestions