I originally rated this as 3 stars, mainly for writing quality. Please remember, YMMV. You may like different stuff than me.
A fast paced action story, it has ninja organisations, deadly assassins, high tech, chases across the world, secrets that can break the world order.
What is doesn't have is depth. Things are too pat. Like big budget Hollywood where twists are there for shock value, not because they make sense.
If you like popcorn stories that don't tax your brain, this is the first of a series as Slade and Hotaru take on a System that has framed them.
The reason it lost a star? Too much senseless killing. And I mean senseless. It made no sense from any angle.
(review of free book)