The Mountain’s Depths is the first book in the Mysterious Mountains series. The main character, an orphan boy, dreams of having an “adventure.” When he is young, working as a stagecoach driver, he meets a man who will grant him his wish. Years later, he is thrown into an adventure across the globe. His adventures may very well lead him to a great, ancient treasure. He encounters many obstacles along the way, including love. Will he live to see the end of the adventure, and perhaps continue on to have many more?