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15 books to try if you're waiting for The Let Them Theory

20th August 2025
15 books to try if you're waiting for The Let Them Theory

It’s sold over 5 million copies, and topped the bestseller list since its release late last year - and it's the hottest book in the Library right now.

The Let Them Theory by Mel Robbins offers a ‘life-changing tool’ based on those two simple words. If you’re on the reservations list, never fear - we’ve ordered extra copies to keep up with demand! And in the meantime, here are 15 books exploring similar themes that you might want to try. Click the titles to reserve today.

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1. Already Enough – Lisa Olivera

Have you ever told yourself that you don't belong, or that you aren't worthy or enough, exactly as you are? It's time to rewrite your story.

In Already Enough, therapist Lisa Olivera explores how our 'stories' affect us - the stories we tell ourselves about the person we are because of the things that have happened to us or the way people have treated us - often a lot more than we realise. Drawing on her own extraordinary experience as an adopted child, abandoned by her mother in California woods just hours after birth, she combines memoir with therapeutic exercises to help us reframe the stories we tell ourselves about ourselves.

 

2. The Courage to Be Disliked – Ichiro Kishimi and Fumitake Koga

The Courage to be Disliked shows you how to unlock the power within yourself to become your best and truest self, change your future and find lasting happiness. Using the theories of Alfred Adler, one of the three giants of 19th century psychology alongside Freud and Jung, the authors explain how we are all free to determine our own future free of the shackles of past experiences, doubts and the expectations of others. It's a philosophy that's profoundly liberating, allowing us to develop the courage to change, and to ignore the limitations that we and those around us can place on ourselves.

 

3. Meditations for Mortals – Oliver Burkeman

Meditations for Mortals takes us on a liberating journey towards a more meaningful life – one that begins not with fantasies of the ideal existence, but with the reality in which we actually find ourselves. Designed as a four-week ‘retreat of the mind’, it offers daily wisdom, solace and inspiration to aid a saner, freer, and more enchantment-filled way of living.

Addressing fundamental questions about how to live, Oliver Burkeman proposes a powerful new guiding philosophy of ‘imperfectionism’. How can we embrace our limitations? Or make good decisions when there’s always too much to do? What if being truly productive means letting things happen, not making them happen?

4. It Starts with You – Lorena Bernal

The secret to happiness is closer than you think…

The truth is that everything we need is already inside us, we just need to unlock it. In It Starts With You, Lorena Bernal guides you on this transformative journey towards self-love, peace, and joy. With invaluable insights and practical takeaways, you’ll discover how to find self-acceptance, trust your intuition and gain the purpose and peace you deserve. This book is a treasure trove of tools designed to help you:

  • Reclaim your power: Embrace your unique gifts and strengths.
  • Cultivate self-love: Nurture your inner beauty and worthiness.
  • Connect with your higher self: Tap into your intuition and spiritual wisdom.
  • Build meaningful relationships: Foster love and compassion in your life.

Creating a beautiful, love-filled life starts with you – and it begins right here.

 

5. The Happiness Trap – Russ Harris

Do you ever feel worried, miserable or unfulfilled - yet put on a happy face and pretend everything's fine? You are not alone. Stress, anxiety, depression and low self-esteem are all around. Research suggests that many of us get caught in a psychological trap, a vicious circle in which the more we strive for happiness, the more it eludes us.

Fortunately, there is a way to escape from the 'Happiness Trap' in this updated and expanded second edition which unlocks the secrets to a truly fulfilling life. This empowering book presents the insights and techniques of Acceptance and Commitment Therapy (ACT), covering more topics and providing more practical tools than ever before. Learn how to clarify your values, develop self-compassion and find true satisfaction with this bigger and better guide.

 

6. Atomic Habits – James Clear

A revolutionary system to get 1 per cent better every day.

People think when you want to change your life, you need to think big. But world-renowned habits expert James Clear has discovered another way. He knows that real change comes from the compound effect of hundreds of small decisions - doing two push-ups a day, waking up five minutes early, or holding a single short phone call. He calls them atomic habits.

In this ground-breaking book, Clears reveals exactly how these minuscule changes can grow into such life-altering outcomes. He uncovers a handful of simple life hacks (the forgotten art of Habit Stacking, the unexpected power of the Two Minute Rule, or the trick to entering the Goldilocks Zone), and delves into cutting-edge psychology and neuroscience to explain why they matter.

7. Ten Times Calmer – Kirren Schnak

Whether you’re going through something and need support to feel like yourself again, or if you have been dealing with anxious thoughts for a long time, Ten Times Calmer is full of practical explanations and and strategies offering the help you’ve been looking for.

Dr Kirren Schnack is an Oxford-trained and practising NHS clinical psychologist with over twenty years’ experience and more than 750k social media followers. In Ten Times Calmer she offers a first aid kit of tools to help you understand what you’re going through and change how you’re feeling – and it might just be easier than you think.

Structured with case studies, patient examples, tasks and summaries, the ten chapters cover everything from dealing with anxious thoughts and stress to managing uncertainty and safely tackling trauma, each taking you a step closer to an anxiety-free life. Inside you’ll find short anxiety-busting exercises with a big impact and a toolkit of well-researched and clinically proven tips that will help you find calm each and every day.

 

8. Life in Five Senses – Gretchen Rubin

For more than a decade, Gretchen Rubin had been studying happiness and human nature. Despite all she'd learned, she began to realize that something was missing: she was spending so much time stuck in her head that she wasn't noticing the world around her.

In this journey of self-experimentation, Rubin explores the mysteries and joys of embracing the senses as a path to a happier, more mindful life: from the simple pleasures of appreciating ketchup and adding favourite songs to a playlist, to practicing daily rituals and attending Flavor University, she discovers the power of tuning in.

Life in Five Senses is filled with profound insights and practical suggestions about how to heighten our senses and live fuller, richer lives - and, ultimately, how to move through the world with more vitality and love.

 

9. Please Yourself – Emma Reed Turrell

We are all people-pleasers in one way or another – even those who deny it.

Whether at work, home or in our relationships, we all know how it feels to want people to like us. The problem comes when we give up our own needs along the way.

In this life-changing book, psychotherapist Emma Reed Turrell explains the different ‘types’ of people-pleaser and provides practical, reassuring advice on how to better understand – and stop – people-pleasing behaviour when it starts to affect your own needs.

10. Atlas of the Heart – Brene Brown

In Atlas of the Heart, Brown takes us on a journey through 87 of the emotions and experiences that define what it means to be human. As she maps the necessary skills and lays out an actionable framework for meaningful connection, she gives us the language and tools to access a universe of new choices and second chances - a universe where we can share and steward the stories of our bravest and most heart-breaking moments with one another in a way that builds connection.

 

11. Emotional Resilience – Dr Harry Barry

There are many challenges facing our mental health. We are living in the middle of an anxiety epidemic, depression is one of the most significant mental health issues of our time, self-harm is endemic amongst school children and technology and social media are insidiously and pervasively invading our lives leading to toxic stress.

In this book, bestselling author and GP Dr Harry Barry reveals how you can unlock your inner emotional resilience reserves, deal with the challenges of life, and protect your mental health. He explores the key skills needed to transform your emotional capacity and reach your full potential.

 

12. I’m not Lazy, I’m On Energy Saving Mode – Dancing Snail

After years of battling with depression and lethargy, author and illustrator Dancing Snail realised the importance of being compassionate to ourselves and taking care of our minds when we feel low. On days you don't feel motivated, are going through a slump, or simply feel like doing nothing, this book provides you with reassuring words on loneliness, adulting, overthinking and more. Written in short-form chapters with charming illustrations, I'm Not Lazy, I'm on Energy Saving Mode gives you radical permission to take the break you don't feel you deserve.

13. The Only Constant – Najwa Zebian

Most people want something in their life to change, whether it's their job, their personal relationships, or their ability to live authentically. And sometimes, unwanted change comes all too swiftly. In The Only Constant, celebrated poet and educator Najwa Zebian guides her reader through the changes we must make (or those we need to endure) on the journey to our most authentic lives. She quiets the noise, teaches us to accept ourselves as we are now, and focuses on the necessity and beauty of those messy transitional times.

 

14. Happy Relationships – Sam Owen

Few things promise greater happiness than our relationships - yet few things cause us more anxiety and stress. Happy Relationships delivers an expert programme that returns joy to any troubled relationship in your life, be it with a partner, colleague or loved one.

Sam Owen, acclaimed life coach and speaker, calmly guides us through effective strategies for overcoming issues in our relationships, from the trigger points to the joyous moments

From arguments to intimacy, self-care to communication, this engaging and practical guide will ensure you only surround yourself with happy, healthy relationships. In just four weeks your relationship can be in a much better place.

 

15. Set Boundaries, Find Peace – Nedra Glover Tawwab

Healthy boundaries. We all know we should have them in order to achieve work/life balance, cope with toxic people, and enjoy rewarding relationships with partners, friends, and family. But what do "healthy boundaries" really mean - and how can we successfully express our needs, say "no," and be assertive without offending others?

Licensed counselor, sought-after relationship expert, and one of the most influential therapists on Instagram Nedra Glover Tawwab demystifies this complex topic for today's world. In a relatable and inclusive tone, Set Boundaries, Find Peace presents simple-yet-powerful ways to establish healthy boundaries in all aspects of life. Rooted in the latest research and best practices used in cognitive behavioral therapy (CBT), these techniques help us identify and express our needs clearly and without apology - and unravel a root problem behind codependency, power struggles, anxiety, depression, burnout, and more.

Looking for more reading inspiration? Check out more from the book blog here.