It's impossible to look down on Earth from space and not be mesmerised by the fragile beauty of our planet.

During my mission I became determined to share this unique perspective of the one place we all call Home. This book captures a journey of discovery, not just the discovery of planet Earth - a stunning oasis of life in the vastness of space - but also the discovery of a newfound passion for photography, which has had a major impact on me. I hope readers enjoy leafing through these pages as much as I enjoyed taking these pictures.

Hello, is this planet Earth? takes readers on a mesmerizing tour of Tim's historic and inspirational six-month Principia mission. Based on over 150 of Tim's stunning photographs that he took on board the international space station, many of which have not been seen before, this lavish collection showcases the beauty of earth from above, and is the perfect visual time capsule of Tim's remarkable trip, which captured the imaginations of millions of children and adults across the world.

The book can be enjoyed by readers of all ages, and comes with a personal commentary from Tim, full of his characteristic warmth and charm. The book includes breath-taking aerial photos of cities illuminated at night, the northern lights and unforgettable vistas of oceans, mountains and deserts. The title of the book is inspired by Tim's famous "wrong number" dialled from space, when he accidentally misdialled a woman from the space station and inquired, "Hello, is this planet Earth?"

During his mission, Tim conducted numerous ground-breaking science experiments and engaged the British public in ingenious ways. Tim became the first British astronaut to complete a spacewalk and the first person to run the London marathon in space. He spoke to hundreds of thousands of school children back on earth via events such as the Cosmic Classroom live from the ISS, engaging over 1 million children during the whole mission. He was also involved in other memorable events, such as presenting the BRIT Awards live from space in a dinner jacket. 24 million people watched Tim blast off and over 2 million fans continue to follow his updates across social media.

In the Queen's birthday honours, Tim was made a companion of the order of St Michael and St George, an award given to those who have given distinguished service overseas, or, in Tim's case, in space.

Tim's proceeds received from the book will be donated to The Prince's Trust.