This set is a model of a steam engine. The train is designed after the Flying Scotsman.
Besides the steam engine the set comes with a tender and one passenger wagon.
The passenger wagon is not available as a separate set. A lot of fans would like there to be a separate set but the Lego company just wants to keep the Emerald Night exclusive. You can however order the pieces on a brick supplier website, but this will cost you a lot of money.
I recently bought this set and it was a lot of fun to build. It took me about 2 hours to assemble the whole thing. For a lego train fan this set is an absolute must have.
Go here to buy one!
Hope you enjoy this set as much as I did.