There are inconsistencies between the different books. Why?

The different books are in different stages of upgrade or complexity. For example: First book (Eat Right 4 Your Type) was a basic synthesis of the concept. It had to make some judgements regarding homogenizing information if it was secretor status specific. If a food was deemed a more serious avoid for a non secretor than it might be as a neutral or beneficial for a secretor, then the non-secretor value was used. The Second Book (Live Right 4 Your Type) had secretor status differences and a very small number of food value changes, reflecting the advances in basic scientific knowledge. The 'little books' (Food and Beverage Guides) Are a mass market book, very simplified, with largely just secretor guidelines and with a few of the altered values included.

Related Topics:
Some people on other internet boards claim that blood testing for secretor status is superior to the saliva test. Is that true?
What about unlisted foods?
What about foods that appear on one blood type list, but not another?
Where can I find the most up-to-date values?
Please explain the two-tier system in Live Right 4 Your Type.
Reporting errors or omissions