I just have to say...I've read the bio. It's definitely not sugar-coated. Sheryl and her family had no input on it, and were not interviewed for it.  There's lots of quotes from David for much of the TNMC stuff. Also lots of "behind the scenes" interview/quotes from songwriter Jeff Trott, who was around for some of the TNMC stuff, as well as engineer Trina Shoemaker.  Overall...not great, but interesting viewpoints from a number of TNMC members.