An hour and eleven minutes is a deliberate choice. A book about focus that demanded ten hours of it would be arguing against itself, and The Focus Battle plainly knows as much.
Smarojit Biswas writes on the personal development shelf, in the compact format that has grown up alongside audio: a single problem, stated clearly, worked through at the length of a commute. The title frames attention as something contested rather than merely lacking, which is a considerably more useful way round for anyone who has tried and failed to simply concentrate harder.
We can speak to the audiobook and not to the author, so that is where this page stays.