The book is located atop the second floor railing inside Two-Knock House, which can be found near Brightwall Academy. It is notable that the name is a possible reference to "The Dangerous Book For Boys"
Grease one large round cake pan. Combine flour, eggs, butter, sugar, and salt in a large mixing bowl, bake thoroughly, then pour mixture into cake pans. Bake for thirty minutes and allow to cool. Note, this activity is in fact perfectly safe and most appropriate for right before your mum discovers you've done any of the other things described in my book.