"Cold Obsidian" is an illustrated fantasy novel you can read for free and/or buy for 1$ (add a tip if you like).

The story is set in a world - Omnis - where magic is stabilized artificially so the humans would be able to use it. In the middle of the main continent, where the stabilizers cancel each other, lies the No Man's Land - a territory of wild magic and magical anomalies. One day, an unknown thief steals the most useless thing in the world, thing that holds no power of its own and promises no riches - one of the stabilizers...