This was a great short novel. Mercy and her best friend Sherry seek each-other out through their rough upbringing. La Llorona is always lurking near Rio Grande, and chooses her next victims by their sorrow and sadness. One night Mercy and Sherry make a blood pact to live happy lives and fulfill their dreams- also avoiding the river witch at all costs. One night, Sherry‘s pain is too big to ignore, and this changes the girls‘ future forever.