What is the book bzrk by Michael Grant about?

BZRK, by Michael Grant, is the first book in a dystopian science fiction series of the same name. The story centers around a group of teenagers who are genetically engineered super-soldiers known as "BZRKs." They've been created by a shadowy organization to be ultimate killing machines, programmed with advanced combat skills and enhanced physical abilities.

However, these teenagers are not simply pawns. They are also imbued with a latent "kill switch" – a suppressed conscience and humanity – that can be activated. The book follows their struggles as they grapple with their programming, their burgeoning sense of self, and the ethical dilemmas of their existence, while simultaneously fighting for survival against powerful and ruthless forces seeking to control them. The story explores themes of free will versus determinism, the nature of humanity, and the dangers of unchecked power and technological advancement.