Answer: The Diamond Age
It's only fitting that Amazon engineers select a literary-based codename for the Kindle and be a smarter yet to. Long before the world knew about Amazon's influential e-reader, insiders already described it as Fiona.
Why Fiona? Fiona Hackworth is a character in Neal Stephenson's sci-fi novel The Diamond Age . The novel is based on the theft of a technologically advanced book that is networked and interactive, contains the sum of human knowledge, and has pages that shift and change right in front of you. The image and idea of such a book has greatly influenced the Kindle designers. The Amazon engineers considered the book's capacity in the novel to be their final destination: a portable electronic book that readers could interact with and draw on vast amounts of knowledge.
Despite renaming the device as Amazon Kindle The code name lives on in a small Easter egg that's hidden on the Amazon servers. If you go to the URL https://www.amazon.com/gp/digital/fiona/manage, you will be redirected to the Kindle Administration page (while the top-level URL has changed over the years, it has been retained) the old address).
If you've ever wondered how a woman's name was inserted into this modest URL, stop asking yourself (and get yourself a copy of The Diamond Age for your Kindle).