The sign of the flame

Mystery novel aimed at advanced youth readers in the spirit of the Hardy Boys. Set in small California town, a team of young adults solve a mysterious series of arsons. pg62 "The sight of the huge flames leaping skyward less than a hundred feet from his bedroom window appalled him. With trembling fingers, he drew on his cloths; although his impulse urged him to run far away, out of sight and sound of the big blaze, he forced himself to leave his room and descend to the garden."