The trailer home shopfront in the parking lot of a veterinary office is about as unassuming as you can get in this unassuming suburb of Birmingham, Alabama. Only the posters hint at the literary treasures hidden inside, showing off book titles as sensually as a strip joint showing off neon silhouettes - today, it's the Southern Lady Code, by Helen Ellis, and Bending Toward Justice, by Sen. Doug Jones, that get the main stage. And below each author's photo, in bold letters, the key word: "SIGNING.