Hold Down a Shadow by Geoffrey Jenkins
In a tiny African state a dam is about to be opened. But one man, aided by four of the world's most wanted men, is determined to sabotage it release a killer flood. The key to their plan is the golden Eagle of Time fashioned by the beautiful Grania Yeats who becomes an unwilling pawn. The author has also written "A Twist of Sand", "The Watering Place of Good Peace", "A Grue of Ice", "The River of Diamonds", "Hunter-Killer", "Scend of the Sea", "A Cleft of Stars", "A Bridge of Magpies", "Southtrap", "A Ravel of Waters", "The Unripe Gold", "Fireprint" and "In Harm's Way".