Try Wall Street Self-defense Manual
by Henry Blodget. See especially Chapter 7 - Meet Your Competition
on page 36.
Blodget should know about that since he once WAS your competition. From the book's Introduction:
Let me begin, however, by acknowledging an obvious irony: My writing this book. Yes, I am that Henry Blodget....
and from Wikipedia:
In 2002, then New York State Attorney General Eliot Spitzer, published Merrill Lynch e-mails in which Blodget gave assessments about stocks which allegedly conflicted with what was publicly published. In 2003, he was charged with civil securities fraud by the U.S. Securities and Exchange Commission. He agreed to a permanent ban from the securities industry and paid a $2 million fine plus a $2 million disgorgement.
The book is an exposé on how the deck is stacked against most investors. That is, those investors who do not understand Boglehead principles. No, he doesn't call it that but his advice lines up pretty good. At least I don't think he calls it that but there is no index so I can't look it up. He does use Vanguard as a counter-example to some of the bad things that go on in the mutual fund industry.
The book really has nothing new, other than the perspective it is written from and I think that perspective might strike a chord with your family member.
There is a theory that the common people know what they want, and deserve to get it good and hard. -- H. L. Mencken (almost)