new Ranger in Time Rescue on the Oregon Trail by Kate Messner. Book number one in the Ranger in Time book series. New. Meet Ranger Hes a time-traveling golden retriever who has a nose for trouble . . . and always saves the dayRanger has been trained as a search-and-rescue dog, but cant officially pass the test because hes always getting distracted by squirrels during exercises. One day, he finds a mysterious first aid kit in the garden and is transported to the year 1850, where he meets a young boy named Sam Abbott. Sams family is migrating west on the Oregon Trail, and soon after Ranger arrives he helps the boy save his little sister. Ranger thinks his job is done, but the Oregon Trail can be dangerous, and the Abbotts need Rangers help more than they realize