Complex sentence: It would be just another day in the life of Stephanie Plum, except it makes her the target of a gang... and the target of an even scarier, more dangerous force that has come to Trenton.
Split into simpler sentences: It would be just another day in the life of Stephanie Plum... except that she becomes the target of a gang. And the target of an even scarier, more dangerous force that comes to Trenton.