The keepers of the black cave

"Some say history repeats itself. Some even say that events repeat themselves in a timeless loop. Nicole and her brothers do not know for sure. But they do know that sometimes when history repeats itself, things can go wrong, and they're here to fix that. What would have happened if JFK had remained alive? What would happen if Elvis didn't really die? What would change if one more boy had died in the Holocaust? Nicole and her brothers are there for only one purpose, to make sure history repeats itself exactly as it did the first time around. They have done it well, for many years. But what happens when the rules are slightly bent? When someone chooses to interpret history? Will the world survive? Will they survive? What will be the cost?"--Back cover.