There is a very interesting book by Anatoly Dyatlov - "Chernobyl- how it was". In Discovery Channel film, he was shown as the main culprit of this disaster. To my knowledge, no one more of participants of this tragedy has left detailed memories. By the way, Discovery Channel also founded on the book, which Dyatlov often refers too, and, for some reason, I believe him anymore.
Link on this book (in russian) - http://pripyat.com/sm/site/fileslibr...how_it_was.pdf