Gill Williams is a travel and natural history journalist with more than 30 years experience. She runs greentravelguides.tv, an internet TV channel showing people how to travel without trashing the planet.
Worldwide including North America.
The book comes at a time when invasive plant and animal species are deemed to be the third greatest threat to life on Earth, after climate change and human population explosion. Recent headline stories include culling camels in Australia, catching pythons in Florida and removing hedgehogs from the Outer Hebrides.