When I saw this book I associate it with The Sticky, Stinky Science Book, a book I read last week and which was awesome. But there's no relation at all between them it's just my weird brain playing with me. So I was a bit disappointed, not the book fault, more because of other expectation. This book as no experience in it and it's a illustrated explanation of all that concern smells (difference, where they came from, how are they useful, and so on). A very specific subject, but if you are interested in it, it cover it all in a good simple way.