I found a couple of books that you might find useful.
The first is "Implementing SAP Sales and Distribution" by Glynn C. Williams. This text was published by McGraw-Hill Osborne Media in 2000.
Another option is "Sales and Distribution with SAP. Making R/3- SD work for your business" by Gerhard Oberniedermaier. This was published by Friedrick Vieweg & Son in 2002.
Both of these texts are available on Amazon.com.
This was first published in January 2004