SCM in Dynamics AX is not my area of expertise but I thought it would be good to get the word out about a new book that's available. The book is called Managing Your Supply Chain using Microsoft Dynamics AX 2009 by Scott Hamilton. This is the third edition of the book, the previous editions are available for Dynamics AX versions 3.0 and 4.0.
In the interest of full disclosure, I have not yet read the book, but it has gotten some pretty good reviews so far. To find out more about the book, check it out on amazon.com.