well, a book is a lot bigger than a journal article or a grant proposal, but i think a few general things are related: making a detailed outline, breaking it down into small more doable tasks, not worrying too much what the rough draft looks like (most writing is mostly editing, at least for me that's true, i probably spend 10% of my time writing and the other 90% of my time editing), and making sure to set aside time every day (be disciplined about it). i know a lot of my tasks seem very overwhelming until i break them down into much more digestible chunks, then its a lot easier to do a large task. and i guess, just starting and just keeping at it. i know a lot of times i look back and am amazed how much i've accomplished, but when i look at it up front before starting, its usually pretty overwhelming if i look at the whole thing.
as for the story itself, others probably gave better advice than i could give, but i'd probably be careful of accusations, true or not, they have to be proven and backed up by facts and even then there might be legal aspects to it all. just be careful, but tell your story, i sounds like you need to.
it also sounds like a very good documentary.......
sounds like some of the topics of michael moore's documentaries......
sue
