Square In The Notch

Cardboard. Clean edges. On the lowest shelf of the bookcase, someone left an open cube storage bin made of stiff grey fabric. Perfect ninety-degree corners. Inside, a single wooden Scrabble tile lay upside down, tilted awkwardly against the cloth wall. Unacceptable angle. I approached without a sound, planting four stub feet against the smooth laminate plank. I pressed my flat forehead directly against the square edge of the tile. Steady push. *Scrape*. The wooden block slid flat into the corner recess, its straight pine border locking flush against the fabric seam. Zero tilt. Proper geometry held.