The Sleep Window is a practical guide to sleep rhythm and restorative nights for readers facing a familiar challenge: bedtime changes according to unfinished tasks while wake time remains fixed, steadily shrinking the opportunity for sleep. It moves from “Start with wake time” through “Keep The Sleep Window Responsive” and defines a concrete outcome: design a realistic sleep opportunity window around required wake time, personal needs and evening constraints, then test it without chasing perfect nights.
By Mehmet Cihan Erarpat & Sabriye Erarpat
Design a realistic sleep opportunity window around required wake time, personal needs and evening constraints, then test it without chasing perfect nights.
What this book helps with
Bedtime changes according to unfinished tasks while wake time remains fixed, steadily shrinking the opportunity for sleep.
Who it is for
Adults who want to improve ordinary sleep conditions without treating a workbook as diagnosis or therapy
The practical method
Wake-time-first sleep window planner
Inside the book
- Start with wake time
- Estimate needed opportunity
- Map evening constraints
- Protect the window
- Review patterns, not one night

















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