Everything this series teaches can be turned around and pointed at you. Most of it already has been.

The apps, the feeds and the betting engines were built by people who understand variable rewards, streaks and loss aversion at least as well as this book does — and they are using them on you, at scale, with far better funding.

This is the cautionary level of the Library: how the trap is built, why knowing about it is not enough, and what actually gets your attention back.

Inside, you will:
- recognise the specific design pattern behind the app you cannot put down
- understand why "just use it less" fails, and what replaces it
- see how streaks, near-misses and infinite feeds are engineered
- rebuild the defaults on your own devices so the pull is weaker

Honest and non-sensational. This is not a book that tells you technology is evil, or that you are weak for losing to it. It is a book about design, aimed at the people design is being used against.

If gaming, betting or screen use has stopped feeling like your choice, please speak to someone you trust or a qualified professional. Support options are named in full inside the book.