In the UK and Australia, the books are published under titles based on the volume number (e.g.: Mia Goes Fourth). Illustrated by Chelsey McLaren: Princess Lessons (March 2003) Perfect Princess (March 2004) Holiday Princess (November 2005) On January 6, 2009, a companion book to Volume X: Forever Princess entitled Ransom My Heart was published under the name Princess of Genovia, Mia Thermopolis by Avon Books, the adult division of HarperCollins, the Princess Diaries series publisher. All author proceeds from the novel, which was printed on 100% recycled paper, go to Greenpeace. In May 2014, Cabot blogged that there will be two new books in the series, one adult book titled Royal Wedding and one spin-off middle-grade book, titled From The Notebooks of a Middle School Princess, taken from the point of view of Mia's long-lost sister, Olivia Grace, to be published in Summer 2015. Since that time Cabot has published two additional books and an eBook short for tweens featuring Olivia Grace as the protagonist. The Mediator series The Mediator Series is about a 16-year-old girl named Susannah "Suze" Simon. Suze is a mediator, whose role is to help ghosts finish their business on earth so they can pass on to the afterlife. To this end, she can see, touch, communicate with, hit, punch, and 'kick ghost butt' when she must. The series begins just after Suze's widowed mother marries Andy Ackerman, so Suze has moved to Carmel, California, to live in an old house complete with three stepbrothers. To make matters worse, her bedroom is haunted by an attractive male ghost named Jesse de Silva, who died 150 years earlier. Suze remembers that back in New York, a fortune teller had told her that she was a mediator (which proved correct) and that she would only fall in love once, but it would last for an eternity. Her one love for eternity just might be Jesse. But does he love her back? The first four books were originally released under the pseudonym Jenny Carroll (this was when Cabot was working with different publishing houses). Haunted was the first title to have Meg Cabot's name on it. The first four books were later reprinted under Cabot's real name in 2005 with new cover art when Twilight was released in hardcover. The UK titles for the series were: Shadowland- Love You to Death, Ninth Key- High Stakes, Reunion- Mean Spirits, Darkest