From the streets of London to the web cafes of South Korea and the deepest darkest forests of Rio, can the Doctor and Donna find the cause of this unhappiness before it's too late?An original novel featuring the Tenth Doctor and Donna, as played by David Tennant and Catherine Tate.

Jenny T Colgan has written 16 bestselling novels as Jenny Colgan, which have sold over 2.5 million copies worldwide, been translated into 25 languages, and won both the Melissa Nathan Award and Romantic Novel of the Year 2013. Aged 11, she won a national fan competition to meet the Doctor and was mistaken for a boy by Peter Davison.