Go ahead, make me care about seashells. I don’t take long walks on the beach with my eyes glued to the sand. Shell shops bore me. And lips that touch oysters will never touch mine. So when I set out to review Cynthia Barnett’s newest book, “Sound Of The Sea: Seashells And The Fate Of The Ocean,” I mouthed a silent challenge to Gainesville’s most accomplished environmental journalist and author. Make me care. I dare you. Well played, Cynthia. Or the CIA’s loony scheme to kill Fidel Castro with a Queen Conch IED. Do you know why somebody called Sanibel Island a gigantic mortuary?