Understanding Multiple Chemical Sensitivity: Causes, Effects, Personal Experiences and Resources by Els Valkenburg My rating: 5 of 5 stars I inhaled this book in one sitting, literally. I gassed myself on the petrochemical inks used in the printing of it; because I wanted to know how, what, why MCS. (Not that I'm an MCS-er (cause like, it doesn't bloody *exist* here in … [Read more...] about Book Review: Understanding Multiple Chemical Sensitivity