This is the map of the Crescent Atoll, funded earlier this year by 226 amazing people on Kickstarter, and hand-drawn by cartographer Mikael Asikainen.
It is included in the newest Yarnsworld novel, ‘To Dream and Die as a Taniwha Girl’, which was made available on Amazon and Kindle Unlimited last week. (The novel will be removed from Kindle Unlimited in 90 days, when it will be available on all other ebook platforms).
Mikael sells prints of the map here: https://www.inprnt.com/…/the-crescent-atoll-black-and…/
Or you can just check out his portfolio over on http://www.orbigraphia.com