** spoiler alert ** The terminal state was a great addition to the Avery Cates series. It lived up to its 3 ancestors being full of action, plot twists and science fiction. I really did love how they made Avery somewhat more agile and younger feeling as in the third book, I was getting quite disappointed in how he was weaker and old. Avery was still fighting the system and he also had a very important mission in front of him. It was really sad how even his team, whom he worked with for 85% of the book turned out to be traitors... again... Other than that, I cant wait until the fifth installment comes out.