Brother Jon,
These may be of help to you:
Respecting "Messianic Judaism" which is related to Christian Zionism:
Amazon.com: Judaism Is Not Jewish: Baruch Maoz: Books
And for a Reformed amillennial take on Romans 11 - see this book beginning on p.141:
Amazon.com: The Bible and the Future: Anthony A. Hoekema: Books
Thanks for the book tips (I have so many books I need to add to my list). I checked out the reviews to get a feel of what they are about. What is the authors take on Zionism?