Development Theory

In her latest groundbreaking book, The Let Them Theory, Mel Robbins—New York Times bestselling author and one of the world's most respected experts on motivation, confidence, and mindset—teaches you how to stop wasting energy on what you can't control and start focusing on what truly matters: YOU. Your happiness. Your goals. Your life.

Awkwardness discusses how we ostracize and punish those who fail to fit into existing social categories, how we all depend on-and are limited by-social scripts and norms for guidance, and how these norms frequently let us down when we need them.

The Polyvagal Theory Workbook for Trauma offers evidence-based activities to help you heal the effects of trauma, rewire your nervous system, and return to a state of balance and calm. You'll begin by getting to know your nervous system, including an exploration of polyvagal theory and the vagus nerve. You'll also learn soothing, body-based practices to help you rewire your nervous response, including rhythmic movements (EMDR and tapping), conscious breathing, mindful movement, and more.

In this audiobook, psychotherapist David Richo explores how we replay the past in our present-day relationships - and how we can free ourselves from this destructive pattern. We all have a tendency to transfer potent feelings, needs, expectations, and beliefs from childhood or from former relationships onto the people in our daily lives, whether they are our intimate partners, friends, or acquaintances.

In order to improve closeness and intimacy in all relationships, it is important to first understand the clear parallels between adult behavior and childhood experiences. Attachment Theory combines traditional teachings with knowledge of subconscious patterns to provide powerful tools for powerful change.

Matt Dahlia was a recent college grad with no direction in his life: his business was dead on arrival and all his friends had left town. He was broke and searching for belonging in a world that didn’t understand him. That is, until he serendipitously met Thomas, who not only felt the same way he did, but had a project in mind: Together, along with two more like-minded strangers, they were going to move into a one-bedroom apartment and film themselves doing 30 things they had never done before in 30 days.

In the years following her role as the lead author of the international best seller, Limits to Growth - the first book to show the consequences of unchecked growth on a finite planet - Donella Meadows remained a pioneer of environmental and social analysis until her untimely death in 2001. Thinking in Systems is a concise and crucial book offering insight for problem-solving on scales ranging from the personal to the global. Edited by the Sustainability Institute's Diana Wright, this essential primer brings systems thinking out of the realm of computers and equations and into the tangible world....

AI makes headlines, but many organizations face stalled projects, fragile infrastructure, and costly deployments. The AI Engineering Bible fills this gap. For engineers, leads, architects, and product owners, it offers a systematic approach to production-ready AI—grounded in best practices, scalable infrastructure, and real-world use. Covering the full AI lifecycle—from problem definition and data acquisition to deployment, optimization, and maintenance—it provides the depth needed to lead AI at scale.

This detailed and persuasive study by the author of The Patton Papers was described by Patton's daughter Ruth as "an extraordinary book". It is widely considered the best biography ever written of the General, an American hero as compelling as he was complex.

In this best-selling classic, child psychiatrist and coauthor of The Whole Brain Child, Daniel J. Siegel and early childhood expert Mary Hartzell explore the extent to which our childhood experiences shape the way we parent. Illuminating important research in the field of interpersonal neurobiology, Siegel and Hartzell explain how the parent-child relationship directly affects brain development, and offer parents a step-by-step approach to forming a deeper understanding of their own life stories to help them raise compassionate and resilient children.

Dr. William Glasser offers a new psychology that, if practiced, could reverse our widespread inability to get along with one another, an inability that is the source of almost all unhappiness. For progress in human relationships, he explains that we must give up the punishing, relationship-destroying external control psychology. For example, if you are in an unhappy relationship right now, he proposes that one or both of you could be using external control psychology on the other. He goes further. And suggests that misery is always related to a current unsatisfying relationship.

Attachment theory explores the different ways we develop connections with others. If you’re searching for a way to create stronger, healthier, and more authentic relationships with the people you love, The Attachment Theory Workbook can help. It’s your guide to understanding your own attachment style and exploring actionable exercises to improve honesty, intimacy, and communication with your partner, family, or close friends.

Whether you find yourself constantly seeking reassurance in love or pushing away from too much closeness, "Anxious Attachment and Avoidant Detachment" provides the tools to navigate the complexities of intimacy with grace and confidence. You'll learn to speak the language of love fluently, to listen with empathy, and to build the kind of relationships you've always deserved—one where love is not a source of angst but a foundation for growth.

One of the very best scientific predictors for how any child turns out - in terms of happiness, academic success, leadership skills, and meaningful relationships - is whether at least one adult in their life has consistently shown up for them. In an age of scheduling demands and digital distractions, showing up for your child might sound like a tall order. But as best-selling authors Daniel Siegel and Tina Payne Bryson reassuringly explain, it doesn’t take a lot of time, energy, or money. Instead, showing up means offering a quality of presence.

Finally, a self-help book for people who are tired of being helped! Sarah Kellerman has zero qualifications to give you life advice. No PhD in psychology, no life coaching certification, and definitely no corner office success story. What she does have is a spectacular track record of following every piece of self-help advice ever published—and still ending up broke, exhausted, and living with her mother at thirty-five. But then something magical happened: she started saying "no" and fighting back. And her life actually got better.

Do you keep chasing love but pushing it away the moment it feels too close? Think it’s time to break free from the emotional patterns rooted in childhood and finally feel secure in your relationships? Rewire Your Anxious Attachment is a transformative guide to help you heal from past trauma, boost emotional intelligence, and rewrite your relationship story using the proven tools of attachment theory—so you can build lasting love from the inside out.

At least one-third of the people we know are introverts. They are the ones who prefer listening to speaking; who innovate and create but dislike self-promotion; who favor working on their own over working in teams. It is to introverts—Rosa Parks, Chopin, Dr. Seuss, Steve Wozniak—that we owe many of the great contributions to society.

Kyle McKallister has lived his life in the shadows. Younger brother to one of the world's most elusive and embattled celebrities, Kyle has carved out a comfortable existence touring with his famous brother and living in the lap of luxury with no commitments or plans of his own, only a deep, haunting loyalty to his brother. But his life is about to be shaken up when the opportunity comes to compete on a popular reality show.

A Life-Changing Collection for Deep Healing, Self-Regulation, and Lasting Transformation Struggling with anxiety, stress, or emotional overwhelm? Imagine waking up tomorrow feeling calm, grounded, and in control, without years of therapy, endless coping strategies, or feeling stuck in survival mode. This comprehensive collection brings together two highly acclaimed books—The Somatic Therapy Handbook and The Polyvagal Theory Handbook—to provide you with a science-backed, practical path to healing from within.

How does science work? Does it tell us what the world is "really" like? What makes it different from other ways of understanding the universe? In Theory and Reality, Peter Godfrey-Smith addresses these questions by taking the listener on a grand tour of 100 years of debate about science. The result is a completely accessible introduction to the main themes of the philosophy of science.