Mystery of the Mixed-Up Teacher — Jerry B. Jenkins

Dallas O'Neil and his Baker Street friends are back! And now, besides playing all their favorite sports, they are also solving exciting and sometimes dangerous mysteries. Several of Dallas's friends are in the same class at school, and there's just a month to go until summer. They love their teacher, Mrs. Lucas, who always makes school interesting and exciting. She's the best teacher they've ever had. Not only that, but she's from their church, so she encourages them in their faith. But suddenly Mrs. Lucas begins acting strange. What's going on? Is it a lesson she's trying to teach them? A game? A puzzle? Or is something terribly wrong with her? Come on along as they find out the answers to those questions, and the Baker Street kids begin a journey of mystery and intrigue that leads them where they've never been before. This book includes some black and white photos.