You have a sleep clinic appointment in about two weeks, and someone has told you to keep a log. That instruction is easy to give and surprisingly hard to follow, especially at 2am when you are awake again and holding a blank page. This short, practical book removes the guesswork. It explains what a sleep clinician is generally trying to learn, offers a one-page nightly record that takes under two minutes, and shows how to fold in the daytime details people forget. It helps you turn two weeks of scattered nights into a single summary a clinician can read quickly, prepare questions worth asking, and understand what the visit may involve. It is organizational help, not medical advice, and it does not diagnose. It also names the symptoms that should not wait for the appointment, including witnessed pauses in breathing, falling asleep while driving, and sudden loss of muscle tone. Written for adults, in plain language, with no scolding about naps, phones, or bad nights. Part of The Night Shift Library.