I hunted down a pdf copy of the book, and found that it doesn't give credit to anyone for the dragon drawing. Here's a copy and paste from the acknowledgements:
"140 The Bridgeman Art Library: Bibliotheque des Arts Decoratifs, Paris, France/ Archives Charmet (t). 141 Alamy Images: The London Art Archive (t). Robbie Jack Photography: (c). 143 Alamy Images: Pat Behnke (br). Corbis: KazumasaTakahashi / amanaimages (tl). Getty Images: Tim Rand (bl)."
The dragon images was on page 142. At a quick glance, the book uses this style of line art on a number of pages, but doesn't attribute most of it to anyone. Conversely, they seem to be pretty thorough on their photos. Here's what the book says at the end of the book for all unaccredited images:
"All other images © Dorling Kindersley For further information see: www. dkimages.com"
DKimages now seems to be a part of Alamy.
"140 The Bridgeman Art Library: Bibliotheque des Arts Decoratifs, Paris, France/ Archives Charmet (t). 141 Alamy Images: The London Art Archive (t). Robbie Jack Photography: (c). 143 Alamy Images: Pat Behnke (br). Corbis: KazumasaTakahashi / amanaimages (tl). Getty Images: Tim Rand (bl)."
The dragon images was on page 142. At a quick glance, the book uses this style of line art on a number of pages, but doesn't attribute most of it to anyone. Conversely, they seem to be pretty thorough on their photos. Here's what the book says at the end of the book for all unaccredited images:
"All other images © Dorling Kindersley For further information see: www. dkimages.com"
DKimages now seems to be a part of Alamy.