HarperCollins has published Valentine's novels in Britain and usually one year later in America.
Finding Violet Park (2007) was re-titled
Me, The Missing and The Dead in the US (2008). Beside winning the Guardian Prize Basque, Catalan and Italian translations of the book were published in 2008, followed by versions in Dutch, French, German, Slovenian, Spanish, and Norwegian. and longlisted for the 2008
Booktrust Teenage Prize. By 2010 it had also been published in Dutch and German-language translations. Valentine's third novel,
The Ant Colony, was published in 2009. By 2011 it had been published in Dutch and in German translations. It was also her fourth novel nominated for the Carnegie Medal, i. e. it was one of the year's top forty children's books published in the UK, in the estimation of librarians. By 2011 it had also been published in Dutch. Valentine takes part annually in the
Hay Festival. ==Works==