Davies certainly did not 'know him best' - a MWT-esque boast that shows how substantial and honest a work this will be. There are other better journalists of integrity better qualified to speak about the late Sir Jimmy Savile and did get to know him well - that they are maintaining a dignified silence at the moment tells us all we need to know about how vociferous the present witch hunt is.
What Dan 'The Man' Davies did do is betray a lot of people in his quest to produce this book and 'make his mark'.
jimcannotfixthis.blogspot.co.uk/2014/07/nazification.html
Mark Williams-Thomas is thanked in the acknowledgements. Say no more.