I've lost track of the number of times I've recommended this book. The biggest selling point for me is that it helps you understand why you and your loved ones behave in the bizarre, annoying ways you do!

The book divides personality types into 9 broad categories, ranging from types like "The Helper" who is the stereotypical caregiver who gives away all of their energy for others to "The Reformer" who believes passionately in doing things responsibly and by the rules.

You take a short quiz and through exploring the types can discover which sounds -- often astonishly -- just like you. Every other sentence had me saying "That is SO me." It's been an invaluable tool in my marriage and friendships as well as my own personal growth, giving concrete suggestions and tools for how to understand and manage my own behaviours and those of others around me. If all newlyweds were given a Marriage Welcome Pack, I'd make sure this book was part of it.