Some writers work at length. Julian Harper, on the evidence of what sits in our catalogue, works at the opposite end of the scale: The Digital Cleanse runs a little over an hour, which is roughly the time most of us surrender to a phone between breakfast and mid-morning without ever noticing it go.
That brevity is a position rather than an accident. A book about reclaiming attention that demanded a fortnight of your evenings would be arguing against itself. Filed across personal development and technology, this is the sort of title built to be finished in a single sitting and then acted upon, which is a far harder discipline to write than it looks from the outside.
The catalogue offers nothing beyond the work, and there is a certain rightness to that here. The argument stands or falls on its own hour.