Hi T.:
Once again, this isn't a book but the Feingold.org site has lots of information and links to articles regarding food additives. I'm also a member of Feingold and as someone else mentioned, you get mailed newsletters, email updates, and professionally written materials that are kept updated throughout your membership.
My daughter has a mood disorder and eliminating the additives has done more for her than the meds. We're currently trying to drastically reduce and possibly eliminate MSG and all the aliases it comes under as well. It's really amazing how great all of us feel about ourselves now that we are eating much healthier by just eliminating additives and going the natural route.
Good luck.
Jen