PARKLAND, Fla. — “Parkland Speaks: Survivors from Marjory Stoneman Douglas Share Their Stories” needed to be written, its authors believe, but wish desperately it hadn’t. The book by 43 students and teachers who lived through February’s high school massacre gives a poignant, raw, and sometimes graphic look into the six-minute shooting spree where 17 died and its aftermath as a well-off Fort Lauderdale suburb suddenly found itself mourning in a global spotlight that has dimmed but will never reach black. “I lost my sense of innocence.