I was given a book for my birthday called Dragon Art by Jessica "Neondragon" Peffer. It's the best book i've read for describing the basics of drawing Dragons and other fantisy art. It also describes some advanced techniques.
ISBN-13: 978-1-58180-657-1
ISBN-10: 1-58180-657-4
Go visit her website, www.neondragonart.com, and buy it.
It's better than chocolate Desert!