Every man has a limit. Jack is about to reach his.

Jack Horwood should be content. His job keeps him busy and renovating his home keeps him entertained. So why does he feel as if something important is missing from his life and he's just wasting time?

Discontent sharpens his attention, and between losing one mentor and watching the other struggle with prejudice and racism, Jack doesn't like what he sees. Walking away is not an option, but neither can he carry on as he has.

It is Rio, whose conduct gives Jack an idea, and his ladder-climbing partner, Tom Gatting, who makes him realise what is important to him.

After that, it's just a question of making a choice. Because when he hits his limit, there's only two directions Jack can go.

Zero Tolerance is the final part of the Zero Rising series, which follows Jack's early life from scared, homeless boy to fierce, independent vigilante hacker. Zero Tolerance is not a romance, but it brings Jack's story to the start of Job Hunt, the first book in the suspense-with-romance Power of Zero series, and Jack's reunion with the man he's carried a torch for since he was seventeen.