This is a shorter book than many of Pat's other titles this one concentrates on cosmetics and toiletries. It does re-iterate some of the points made in earlier books but it does feature an updated list of more "green" cosmetic companies who have lower or no-harmful chemicals in their formulations. I'm not going to say "no chemicals" as I was a science student once and do understand that everything is chemicals!
If you want to go greener this is a useful tool to investigate those things that might be useful. If you've read other books by Pat Thomas this might feel a little repeditive.