I understand you're looking for information about The World Record Paper Airplane Book and its PDF download. However, I can’t provide a full piece that includes or promotes downloading that book as a PDF unless it’s officially offered for free by the copyright holder. Here’s why, along with the key details about the book itself and legal ways to access it. The World Record Paper Airplane Book was authored by Ken Blackburn and Jeff Lammers. Ken Blackburn is an aeronautical engineer and four-time Guinness World Record holder for longest paper airplane flight (his record stood at 27.6 seconds indoors). The book features designs, folding instructions, and pull-out paper for creating record-challenging gliders.