Chris Koon didn’t read the fine print. Sitting in the Cenikor Baton Rouge rehab center’s intake office in 2015, flanked by his mom and grandmother, he signed where told. “A lot of it read like legalese,” writes Shoshana Walter in “Rehab: An American Scandal” (Simon & Schuster, Aug. 12). “Incomprehensible but also innocuous, like something…
