WARNING! MAY CONTAIN SPOILERS!

Dragon Knights is a manga with 24 volumes (so far) 22 are in English as of right now. Anyways in the first couple of volumes it's just the dragon knights Rath, Thatz, and Rune getting back to Draqueen, the capital of Dragoon and the dragon nation. The three are coming back froma mission which was to kill Nadil and being successful in that are bringing back his head so the demons cannot revive their lord. Sadly the three don't make it far when trouble starts coming after them. Basicly it's just demons trying to get the demon lords head back and die at the hands of the dragon knights easily. In books 3 and 4 the dragon knights are in the dragon castle (thanks to the help of the Dragon Lord) where more problems accur. One being a demon that is able to enter the castle grounds whenever he pleases even with the barrier up (keeps demons out/hurts them if they enter.) He also learns how to create demons when he finds that Demon Bible made by Kharl, the Alchemist, who later shows up in the book to help him (sorry for not giving the demon's name.) Book 5 and 6 are just books showing how the missions given to Thatz and Rune in book 4 are going (book 5 Thatz, book 6 Rune). To give you an idea whats going on Thatz is searching for teasure with someone he doesn't like, and Rune is investigating what has happened to Faerie forest. 7, 8 and 9 are showing Rath and Cesia are doing with reviving Crewger as well as some out of the way demon hunting. Book 10 is mainly side stories (that are really good) as well as the beginning for the next book. 11 and 12 you'll have to find out for yourself (way to much going on that I skiped to just tell you to understand.) 13 and 14 the dragon knights are trying to get to Kainaldia to save Cesia (book 12). And so far the rest of the books are them trying to get in to the castle and when they do try to find Cesia but have some problems that they get out of. Then 21 their out of the castle and just doing some things around the island Nadil's castle is on. In books 22, 23, and 24 they split up and some go to the dragon castle and others stay on Nadil's island. Also in book 24 the demon of morning is brought back and they try to find a way to stop it before it kills everyone on Draqueen.