The Sarajevo Hypothesis

Rudi Kessler broke the world. He built a time machine and tried to stop the worst events of the twentieth century from taking place. But that was in another life and now his younger self has to try to fix it, with the help of Olga, his sister Carla, and Henry Clive.
Carla and Olga must traverse Europe, taking out key figures from history, whilst maintaining the air of respectable Edwardian ladies.
Henry, after posing as his own father during the Boer War, must blend into the corridors of Westminster, influencing the decisions that will bring Europe back from the brink of war.
Rudi will travel to German Southwest Africa during the Herero Wars and must use his knowledge of future events and his war record to rise through the ranks of the Prussian diplomatic service.

How much meddling will history suffer before it starts to fight back, and how many alternate futures are too many? Rudi Kessler may be about to find out how strong the fabric of time really is...