The sentinels

"Five characters, with gifts they do not fully understand, are mysteriously brought together to battle growing pockets of darkness throughout the world... Thousands of animals are mysteriously dying all over the globe... falling from the sky, washing up on beaches, and dying in lagoons. What could it mean? When the tragedy moves from Andi's dreams into reality, she discovers a pattern in the mass deaths, and her theory doesn't bode well for mankind..." -- back cover.