The book "Travelling Three" by Gertrude Franklin Horn Atherton is an exciting novel about the adventures of three friends who cross country borders to discover new cultures and test their strength in unusual conditions. This book is full of mystery, friendship and danger. The author skillfully describes each stop on the journey, giving the reader the opportunity to feel all the magic and adventure accompanying the heroes. "Traveling Thirds" is a book that will enchant the reader, leaving him with the desire to go on his own exciting journey.