By itself Sight Reading Secrets cannot guarantee high marks in a AMEB music exam. There are many other factors involved. Your child will still need to practice and work hard on the other skills that make up the exam.
However I am confident that if your child uses Sight Reading Secrets as part of a regular practice plan they will master the sight reading skills of the exam. I’ve seen it happen enough times with my own students and those of my fellow teachers.
I’m so confident that if your child practices regularly with SRS over the course of a year and you don’t feel like it has helped them at all with their sight reading during the exam, I will refund your money within a year of purchase... and you can keep the book.