Overthinking is also known as worrying or ruminating and it's a form of anxiety that many people suffer from. Psychologist and New Zealand bestselling author Gwendoline Smith explains in clear and simple language the concepts of positive and negative overthinking, the truth about worry and how to deal with the 'thought viruses' that are holding you back.

She helps you understand what's going on in your head, using humour, lots of examples and anecdotes, and she offers powerful strategies for addressing your issues.

Based on cognitive behavioural theory, this book will help you in all the key areas of your life: from your personal life to relationships and work.

THE BOOK OF FEELING BLUE offers hope to those experiencing depression, explaining the nature of the condition and the many different forms it can take at different life stages, and offering straightforward advice about how to manage it. Written in a chatty, reassuring tone with supplementary illustrations included throughout to demonstrate key points, chapters cover all aspects of the condition, including how to support a family member or friend who may be suffering from it, providing a therapist's evidence-based, practical toolkit for dealing with this widespread and debilitating mental-health problem.

Written in an accessible and humorous style, this book teaches you to know what's going on in your mind and how to get your feelings under control. It'll help you adapt and feel better about your place in the world. Psychologist Gwendoline Smith uses her broad scientific knowledge and experience to explain in clear and simple language what's happening when you are feeling overwhelmed, anxious and confused.

There's a lot of angst around these days. This heightened sense of fear, concern, insecurity and uncertainty can be overwhelming. Bestselling author of The Book of Overthinking and The Book of Knowing Gwendoline Smith explains what angst is and the ways in which deep anxiety can manifest. Gwendoline then drills down into social anxiety, which is often underdiagnosed but is one of the most common of the anxiety family. Using simple, clear language and humorous illustrations, Gwendoline gives detailed step-by-step advice on how to cope.