In 2006 Cost signed a £300,000 advance with Random House for Katie Price's Ideal Ponies, a series of kid's books, with the first 6 released in 2007. more books have been released throughout 2008.A title from that series, My Pony Care Book, was nominated for the WH Smith's Kid's Book of the Year. In 2008, they released a new kid's book series entitled Mermaids & Pirates, with six in the series. more are expected for release in April 2008.
Katie & Peter: Unleashed began on Friday 19 October 2007 at 9 pm on ITV2. A new series titled, Katie & Peter: The Next Chapter Down Under aired on ITV2 on 27 March 2008 at 9 pm walking for 13 weeks.Katie & Peter: Stateside began on Thursday 16 April 2009 on ITV2 & followed the relatives as they relocate to Malibu, Indiana for months, where Andre recorded his new album.
Her second ghost-written novel, Crystal, about a young woman's efforts to become a singer, sold 159,407 copies in the work of the first months after its release in June 2007.All books were ghost-written by Rebecca Farnworth