April 23rd is St George's Day. St George is the Patron saint of England and Ethiopia amongst others and died on 23rd April 303. He was a Roman soldier and is probably best known for the legend in which he slays a dragon. Some books featuring dragons:
The fire within by Chris d'Lacey; How to train your dragon by Cressida Cowell; The dragon whisperer by Lucinda Hare.
Ferno the fire dragon by Adam Blade; DarkIsle by D.A. Nelson; Dragon fire by Charles Ashton.
Dragon rider by Cornelia Funke; Dragonborn born by Toby Forward; Eragon by Christopher Paolini.