Madeleine McCann
One donation appears to from a group of Met Police officers.
She has been missing for almost nine years.
The book is titled 'The Truth of the Lie'.
'There is always a possibility that we will find Madeleine.'
PM has a 'conflict of interest' by being so close to media executives, he says.
About Madeleine McCann
Madeleine Beth McCann (born 12 May 2003) disappeared on the evening of 3 May 2007 from her bed in a holiday apartment in Praia da Luz, a resort in the Algarve region of Portugal, sparking what one newspaper called "the most heavily reported missing-person case in modern history." Madeleine was on holiday from the UK with her parents, Kate and Gerry McCann, her younger twin siblings, and a group of family friends and their children. Her whereabouts remain unknown.