Not exactly. It covers sleep timing, light and the first hours after landing because they affect how the flight lands on you, but the focus is the flight itself rather than a multi-day adjustment programme.

No brands and no supplements. It describes what a sleep kit needs to do and where people go wrong buying gear, and it leaves anything medical, including sleep aids and circulation risks, to your doctor.

It is an instant digital download. Once your order is complete the PDF is available straight away — nothing is shipped and there is nothing to wait for.

Any device that opens a PDF — phone, tablet or laptop. The file is yours to keep with lifetime access, and you can print it if you prefer working on paper.

It is written for economy and premium economy, where the trade-offs actually bite. There is a section on judging whether an upgrade is worth its price, but nothing in the guide depends on having one.

Refunds are handled under the store’s Refund Policy (30 days), with the usual caveat that applies to digital products you have already downloaded.