There is "Dragon Magick" which explores the concept of dragons as spiritual entities that teach magic and so forth, at least so far as I understand it. But even then, the origins of dragon magick and its resources aren't terribly reputable in my opinion.
dragonology is the study of dragons [like zoology or biology] no spiritualism to it, it's just studying the history, the myths and regions dragons are from.
if you mean Dragon Magick, the spiritual path incorporating dragons, not a lot of resources for you since very rarely do the practitioners write things down, and even rarer do outside clan members receive information.
you could look at angelfire.com or fox-moon.com for information. i also wrote an article on here [look in the spellcasters articles for 'Dragon Magick'] to answer a few frequently asked questions. mind you, i don't teach, and i don't know many dragon mages/witches that do. you'll need to train with dragons [astral of course] if you want to learn. they do know when someone is afraid, or has less than honourable motives, so you can get attacked if you seek to lord over them, or use their strength for revenge. while they are powerful, they don't bother in many fickle matters. [like a love spell or someone stole your pen]
I believe I have that same book for my daughter. It's part of a collection written for children. There are others in the series that include Wizardolody, Fairyology, Egyptology, etc.
I wouldn't consider it a good source of information or remotely reliable, as it's more for entertainment purposes.
have it as well. it's alright, does have some decent information, but it's for children, so it's not really a reliable source. they are correct with their dragon information, but the whole how to find one, how to raise one, and the spells in the back, are in there for the kids. i mean, maybe once they were physically real, but i highly doubt it's true even today. while it is said to be one a rare book, and it's republished by Ernist Drake, try doing some research on the man. i did some many years ago, and found very little information on him being a real person. there's a little, but nothing more than what someone with a basic knowledge of how to make websites could conjure up.