Welcome to Tortoiseshell Studio! I'm Nathan Curtis, and I write puzzles. I chiefly write variety crosswords, with the occasional logic puzzle or puzzle hunt. My variety puzzles have appeared in outlets such as AVCX Crosswords and Will Shortz's Wordplay, and my puzzle hunt credits include events for the National Museum of Mathematics and the Boston Area Puzzle Hunt League. Additionally, I publish my own variety puzzles at the Tortoiseshell Studio Patreon and my online puzzle hunt Verwald's Treasures is launching in the summer of 2022.