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Circadian

The new science behind the essential rhythms of your health
By Ian Hickie
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Brief Description
Understand your personal circadian rhythm to unlock the secrets to optimal health and wellbeing. If you feel tired, foggy, wired at night or flat during the day, the problem might not be willpower or sleep alone. It might be your body clock. In Circadian, Professor Ian... Read More
Format: Paperback / softback
$4000
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Releases 9th March 2027 (Approx. Date) Pre-order  "Circadian" now to secure your copy from our first shipment

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Book Hero Magic formatted this description to make it easier to read. While it's new and still learning, it may not be perfect - your feedback is welcome! Description

Understand your personal circadian rhythm to unlock the secrets to optimal health and wellbeing.

If you feel tired, foggy, wired at night or flat during the day, the problem might not be willpower or sleep alone. It might be your body clock.

In Circadian, Professor Ian Hickie reveals the hidden 24-hour system that governs your mood, metabolism, immunity and mental sharpness. Drawing on three decades of clinical research as a global leader in circadian science, he shows how modern lifeβ€”artificial light, erratic eating, shift work, chronic stressβ€”pushes our internal clocks out of sync, leaving many of us feeling permanently jet-lagged.

Discover the four powerful circadian levers you can control:

  • light exposure
  • sleep timing
  • eating patterns
  • exercise timing

Morning light sets your master clock. Well-timed sleep restores brain and body. Eating in alignment with your metabolic rhythm helps protect against weight gain and diabetes. Exercise, especially in the morning and late afternoon, strengthens and stabilises the entire system.

This is not a sleep book. It is a blueprint for whole-body health. From depression and burnout to heart disease and cognitive decline, Hickie explains why timing underpins nearly every system in your bodyβ€”and how small, consistent changes can transform the way you feel.

When your clock works, you work. Circadian shows you how to get back in syncβ€”and stay there.

Book Details

INFORMATION

ISBN: 9781761620881

Publisher: Penguin Random House Australia

Format: Paperback / softback

Date Published: 24 November 2026

Country: Australia

Imprint: Penguin Random House Australia

Audience: General / adult

DIMENSIONS

Spine width: 1.0mm

Width: 1.0mm

Height: 1.0mm

Weight: 1g

Pages: 272

Collections

Education & Reference Health & Fitness Health & Wellness Ian Hickie Non-Fiction Non-Fiction Pre-Orders Penguin Books Pre-order Books Pre-orders Pre-orders by Release Date Science & Nature Self-Help & Personal Development

About the Author

Professor Ian Hickie is a psychiatrist and Co-Director of Health and Policy at The University of Sydney's Brain and Mind Centre. He is one of Australia's leading advocates for, and commentators on, mental health. He was the first CEO of Beyond Blue, the national depression initiative, and an inaugural Commissioner on Australia's National Mental Health Commission. Ian is also an internationally renowned researcher in psychiatry, with a specialism in circadian science.

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