Textbooks like Signpost Mathematics Enhanced 9 are intellectual property. They are the result of years of work by authors, editors, and publishers (in this case, typically Pearson Australia). Copyright laws protect these works to ensure that creators are compensated for their labor.
The most reliable way to access the "Enhanced" features is to purchase the book or the digital access code directly from Pearson. When you buy the digital access, you get the official eBook. This is usually hosted on a stable platform that works on any device. It guarantees that all the videos, interactive quizzes, and hotspots are active and functional. download signpost mathematics enhanced 9.pdf
If you need a digital PDF for legitimate use, you have three official (and superior) options. These ensure you get the full "Enhanced" experience, including interactive links that a raw PDF lacks. The most reliable way to access the "Enhanced"