I replied to Amazon's last email as follows.
Please reconsider your decision. My book is a memoir about growing up a Star Wars fan. It is not at all trademark-infringing. You have not said that you have had any complaint from Lucasfilm or others, and I cannot imagine that you would. There is more information about my book, and how we have got to this point, on my blog here:
Thank you for your attention to this matter. Please feel free to call me at the number below if you would like more information.
I got this reply:
We have reviewed the information you provided and have determined that we will not be making the book available for sale in the Kindle store at this time. As mentioned in our previous correspondence, while we cannot advise you on trademark laws, we encourage you to conduct your own research by possibly going to your local library or using other online resources that may be available to you.
I'm sorry, but we can't offer any additional insight or action on this matter.
If you have any ideas about how to solve this, please email me at firstname.lastname@example.org or add a comment below.