While this book is aimed at 10+, as an adult, I enjoyed it very much. Sometimes I like to mix it up, and I love a good mystery. The book has it all, suspense, red herrings, and an evil witch disguised as the new head of school. And there are humorous moments too. Ten-year-old Asley decides to solve the puzzle of those messages and finds himself tasked with saving the world from evil. From the moment the first mysterious message from the Phantom Scribe appears on the blackboard to the moment Ashley figures it out, the author maintains good pacing, well-sprinkled clues, and humor.