Changes

|title=Cathy's Book

|author=Jordan Weisman, Sean Stewart and Cathy Brigg

|date=January 2008

|isbn=978-0747594741

}}

Cathy is in her last year at high school but like most girls her age, she wishes she were just that little bit older. So, when she gets a rich and glamorous boyfriend, she omits to tell him quite how old she really is. Victor takes Cathy to upmarket restaurants and out for flights in his own plane. Unsurprisingly, Cathy is well on her way to falling in love. When Victor dumps her unceremoniously, she's devastated. And unsurprisingly too, the dumped Cathy demonstrates her immaturity by deciding to make life as difficult as possible for Victor. Despite the warnings about stalking from her sensible best friend Emma, Cathy breaks into Victor's house. What she finds leads her down some very dangerous paths.