If you're talking about Arnold Ehret. Yeah, he has some writings, but it's just another rehashing about how we should eat vegan diets. He uses mucus as another "angle" to promote veganism. If I could get copies of his works from a library, I might read it. Don't waste your money on all those books though. Many blessings and good health to you!
found it :)
soilandhealth.org has a lot of his stuff, as well as a tonne of other interesting books on... soil and health.
I loved Arnold Ehret's Mucusless Diet healing system book. It's only something like $5 on line. Well worth it.
mucus free living is doing the 801010 low fat raw vegan diet - all you need is doug grahams 801010 book and follow the diet- seriously you will not only deal with mucus it will start healing your body in parts of it you dont even know its damaged.