JENNY, 16, WISHED SHE HADN'T FOUND IT. Bobbi's monthly list of bills, scrawled on an Aid to Families with Dependent Children stipend envelope, was tucked beneath an ashtray holding a half-smoked joint and smashed cigarette butts. "Mary Jane...rent...PG&E...groceries." As always, Jenny's mom's weed connection topped the list while food sat at the bottom. Residing in rural Concow, California, in the 1980s, Jenny is accustomed to pot being the...