"Frontier Boys in Frisco" by Capt. Wyn Roosevelt is a fictional novel written in the early 20th century. The book recounts the adventures of Jim Darlington and his friends, known as "The Frontier Boys," as they journey to San Francisco and encounter various challenges along the way, including a train heist. The narrative captures the spirit of youth and adventure while offering a glimpse into a pivotal time in American history as the characters navigate the Old West. The opening portion of the story introduces Jim Darlington, who is excited about riding a locomotive called "The General Denver" on his way to San Francisco. He enjoys a friendly camaraderie with the engineer, Bob Ketchel, and is prepared for what the journey might bring, including the peril of train bandits. As the train traverses through remote mountain terrain, Jim senses danger, and soon enough, a hold-up occurs, leading to a thrilling exchange of gunfire between the train crew and the bandits. The scene is set for high-stakes adventure as Jim demonstrates his bravery and determination to protect the passengers while also foreshadowing further challenges that await him in the city. (This is an automatically generated summary.)