FREE today on Kindle: Richard III and the Princes in the Tower by AJ Pollard
I can't recommend based on anything other than it's free since I haven't read it yet, but if you love the Wars of the Roses era as much as I do you'll want to pick this up.
http://www.amazon.com/Richard-III-Princes-Tower-Pollard-ebook/dp/B00SBBRGIE/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1425305596&sr=1-1&keywords=richard+iii+and+the+princes+in+the+tower
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