In the tradition of the Bobbsey Twins and the Hardy Boys, here is the exciting conclusion to Dave Dashaway’s aeronautic adventures! Dave Dashaway and Hiram Dobbs are preparing for a new aerial contest, but competition is fierce, and dirty! An old enemy lurks in the shadows, sending spies and saboteurs. Add some new friends and a diamond thief into the mix, and you’re in for another exciting Dave Dashaway adventure! “Books for Boys” by Roy Rockwood are great for homeschoolers using classic literature studies such as Charlotte Mason or Thomas Jefferson Education. Spellings have been standardized to U.S., but the language has not been abridged or dumbed down. Short, fast-paced chapters keep students engaged. Appropriate for middle-grade readers. This Workman Classic Schoolbooks edition contains: Background/Introduction Biography Footnotes Vocabulary and Comprehension/Extension questions after each chapter Discussion Questions suitable for students or book clubs Extension activities