I just started reading Without Warning by John Birmingham. After Twilight it's a blessed relief.

In the first 50 pages 300 million people are killed and various planes, boats and cars crash in some freak occurrence, and on page 51 a female assassin kills two evil pursuers in about three seconds using just her bare hands and a scalpel. That's more like it. This book should make up for the last one's criminal lack of action quite well.