Wise and gentle King Gunther has a problem. He's not getting any younger, and his daughter and sole heir, Linda, seems to have no interest in getting married and perpetuating the royal line.So Gunther and his loyal advisor Walter cook up a plan — a week in Princess School for Linda, where she will presumably learn how to recognize Prince Charming when he shows up, and attend a huge ball open to all the young men in the country.That's the modern-day fairy tale premise behind a new self-published book authored by Bobby Cinema, the pen name of Maryville resident Bobby Chavala.Writing children's books is not an unusual hobby. Thousands of amateur scribblers across the country try their hand at it every year. But Chavala, 32, has faced, and continues to face, a challenge many writers would find insurmountable — autism.Intelligent and articulate, Chavala holds an associate's degree in office information systems from Northwest Missouri State University. Nevertheless, his condition has left him with a limited ability to communicate and interact with others. That would be a huge problem for most people who write, since understanding and exploring interpersonal relationships frequently amounts to an author's stock in trade.But while still a teenager, Chavala discovered that the quiet and self-directed discipline of organizing words into sentences and paragraphs opened up his world and allowed him to say things that were otherwise unsayable."I have trouble trying to express feelings and emotions," Chavala said this week during a break from his job in the fabrication shop at the NoCoMo sheltered workshop in Maryville. "Writing is how I express myself."In coping with a condition often associated with loneliness, Chavala has managed to populate his own world, an alternate universe inhabited by characters who struggle, grow, learn, survive and ultimately triumph.Perhaps not surprisingly, Chavala has created several full-length scripts for action movies in which heroes overcome incredible obstacles to defeat evil and win through to a happy ending.His real-life hero, he says, is Sylvester Stallone, who as a relatively unknown actor wrote the script for the first "Rocky" movie, a classic tale of persistence and courage in the face of overwhelming odds."It's a gift and a curse," said Chavala of his autism. "But I think it gives me insights that other people don't have."These days that insight is leading the Maryville High School graduate to turn his talents to fairly tales. He has already followed "Princess School," currently available online from Trafford Publishing, with an as-yet unpublished sequel, "The Princess and the Angel."As with many writers before him, Chavala said he is attracted to the centuries-old formula because such stories show what happens to ordinary people — or even kings and princesses — when they are forced to respond to extraordinary circumstances.It takes a lot of determination, after all, to live happily ever after."I've always had a fear of messing up," said Chavala, who, besides Stallone, admires John F. Kennedy for his long struggle with a number of physical challenges. "I just want to prove myself — prove that I can do it."