I'm going to write a proper review of this book as soon as I get a moment but in the meantime I can't recommend it enough!
If you're doing your best to live as sustainably as possible but are desperate to do more then this is the book for you. It's pretty short and concise which makes it an easy read for pretty much anyone. The facts are hard hitting but there's loads of useful, actionable advice and some great tips.
I was given my copy as a gift but if you'd like to buy one for yourself I've got a very limited number available here