After a month Amazon has failed to correct the problem and the work-around/life hack has not worked for everyone. If you pre-ordered Nightingale from Amazon and are still waiting, email eg@egmanetti.com. An ARC will be sent to you.
Once again, I am so sorry for the all the hassle.
EG Manetti 
I emailed you and got no reply. 😦
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I am sorry, I don’t have a record of your email. If you will email me again: eg@egmanetti.com, I will send you a clean Nightingale mobi file for your kindle.
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Hi, I did find your email. I was looking under raven and should have looked under Nyctophilia. According to the comment you posted on my goodreads blog, you did receive the author copy and enjoyed it. Let me know if there is something else I can do.
https://www.goodreads.com/author_blog_posts/17904052-nightingale-correction-fail-life-hack?comment=189468314#comment_189840218
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