Here are some of the books I've read and found helpful:

Home Safe Home by Debra Lynn Dadd
Let's Stop Poisoning Our Children by Debra Lynn Dadd
What Your Doctor May NOT Tell You About Children's Vaccinations by Stephanie Cave, MD, FAAFP

The Master's Diet by Jordan Rubin
Nourishing Traditions by Sally Fallon
Eat To Live by Joel Fuhrman
What the Bible Says About Healthy Living by Rex Russell MD
The Body Ecology Diet by Donna Gates
Gut & Psychology Syndrome by Natasha Campbell-McBride MD
Breaking the Vicious Cycle by Elaine Gottschall

These nutritional books hold some contradictions, which at first frustrated me, but as I pieced together a big picture and did additional research on-line, I came to a good picture of what is good and what isn't. But, in each of these books I found an intrical piece to that puzzle.

The Yeast Connection by William G. Crook, MD
How to Raise A Healthy Child...In Spite of Your Doctor by Robert Mendelsohn, MD
Digestive Wellness for Children by Elizabeth Lipski, Ph.D, CCN (Actually I'm still reading this one)
The ABC Herbal by Steven Horne

Is This Your Child? by Doris Rapp, MD
Tracking Down Hidden Food Allergy by William G. Crook, MD
Allergies: Disease in Disguise by Carolee Bateson-Koch DC ND
Live Free from Asthma and Allergies by Ellen Cutler, DC

Healing the New Childhood Epidemics (Autism, ADHD, Asthma, and Allergies) by Kenneth Bock, MD and Cameron Stauth
Disconnected Kids by Dr. Robert Melillo
Changing the Course of Autism: A scientific approach for parents and physicians by Bryan Jepson, MD
Unraveling the Mystery of Autism and Pervasive Developmental Disorder by Karyn Seroussi
Louder Than Words by Jenny McCarthy
Mother Warriors by Jenny McCarthy
He's Not Autistic, But... by Tenna Merchent