I got what I wanted. Thank you for the help.
I created an html page and put it in a directory called /booskshop/
The page contains my shop's logo, the page background, and the iFrame link provided by Amazon for my aStore.
I created an EZpage that linked to the new page (made it an internal link) - and put in the full URL to the Bookshop. I made it so it would open up in a new window. I think this is a good idea since it would help with any confusion about the shopping carts. Think I'll add a comment on the page that any purchases of books or magazine from the bookshop will go through Amazon.
Also wanted to check to see if I lost what was in the shopping cart. I signed into a dummy account I made. Put several things in my shopping cart. Went to a product page, clicked the link to Bookshop - which opened in a new window. When I went back to my shopping cart - the items were still there. When I logged out, closed the window, and went back again - the items were still in my shopping cart. I even tried it by not signing into an account and after I clicked on the Bookshop link - the items were still there.
Now, on to edit the stylesheet to get rid of the ugly blue link. :-)
I thought I would post this so if anyone ever searches on how to work with EZpages they would see what I ended up doing.
Sandra