These dragons created by Ciruelo are very well known all over the world. All of them are included in the legendary The Book of the Dragon, which was published in eight languages so far.
Draco Rex
Flying Dragon
Earth Dragon
Sigfried and Fafnir
Dark Dsurion
Hobsyllwin
The Galleon of Sacrifices
Ciruelo has being considered an artist specialized in Dragons since Paper Tiger published The Book of the Dragon back in 1990, in London, distributing it all over the world.