Filing a work under both personal development and technology is a neat description of the digital detox as a subject. The Art of the Digital Detox belongs to the shelf that studies habits and to the shelf that studies the devices designing them, and Marcus Waverly evidently wants both.
The word art in that title is the interesting choice. It suggests something practised and refined rather than a purge to be endured, which is a considerably more sustainable framing than the abstinence language this topic usually reaches for.
What our catalogue can attest to ends there, and we will not embroider it.