Ken decided to try out the book on the boys leering at some girls. They seemed they're his age but the girls were definitely older. He tried to comprehend them, he was dealing with puberty too, but he thought he could play with them a little. Before he tried anything he wrote so anything he writes won't be noticed by all but him unless he writes that will be noticed by others. He then thought of the boys and what's on the page changed to info about them whose names are Tom and George with a picture of their bodies.
Ken wrote changes done to them will happen in a few minutes. Then he changed their ages from 13 to 30. Ken watched as they aged as the minutes past their bodies growing up. He wrote that they had horse penises and balls and watched as their pants bulged out obscenely between their legs. He then reverse it and turned them into horses with human genitalia. It was so fun to watch that he wrote they will swap between those forms each time they are aroused. But for now, they will be human again.
'Wow this thing is damn cool. Let's make it so only I can use this thing.' Ken thought to himself. He undid the age change on the boys before thinking of the rules for the book. He wrote that only he can use or see the book with no one else being able to use it till the day he dies and then it's will do the same to the next person who opens the book with a explanation of what it is. It will appear to him if her does it have it. So what to do with it now?