Let alone the sort, but he was totally praising of MM in an interview beforehand.
I don't think anyone leaned on him, just as no one was leaning on him during the televised interview. If Bower had showed him how he intended to frame it, he
probably would have corrected it.
If for example you say "I know her'. That is just a statement, and when someone phones you and says, that is what I'm quoting, you will agree. In this case, clearly Bower told him that, but just left out that afterwards, he described it as: 'I know her', he sneered/frowned etc. Technically correct. I don't think the Sam guy can legally do anything about it.
That is pretty much the vein of Bower's book. Together with smattering of 'I think........' and other non-sourced declarations. He has forgotten he is writing a biography, not a novel or a SM post like us.
Just like a lot on his book, Bower stays within the law, whilst lying.