This is the follow-up to "Relentless" which introduced the group of superheroes led by Grant Borrows, nicknamed Guardian. This story takes place two months after the events of the previous book where the world is still being shaken regularly by natural disasters and other events. Grant and the rest of the Ringwearers, the people with superheroic powers, are working hard and doing all they can to mitigate the disasters whilst at the same time being hounded by the media and knowing that the US authorities view them with mixed feelings. There is a subplot in this story of the head of the US team, Ethan Cooke, who shadows them to learn about their skills and to evaluate their threat, as well as the continued investigation by the superheroes into what caused their skills and what is the mysterious Secretum of Six which may be working against them.
The book is written in an almost episodic form with most chapters just three or four pages long, making it feel a little disjointed to the reader. Characterisation was rather sparse, particularly of Grant Borrows, the hero, and the large cast of main characters meant it was rather difficult to fully get to know them - and they kept getting killed. Somehow this book lacked a certain style or grittiness to make it unputdownable; it felt rather more like a series of set-piece events interspersed with filler to frame the superheroes' rescue missions. There was quite a high level of violence and little apparent reflection on events and their wider meaning which would have been helpful to this reader who couldn't follow what was going on most of the time. The end of the story didn't provide a resolution, merely a springboard for the third book in the series, but it's not one that I will bother to read.