I haven't read the book itself, but Roberts' has a reasonable publication history in the peer-reviewed lit and her letters there regarding reduced benefit of statins in women are sound and evidence-based.

That said, it's been known for a while among critical docs that statins should really only be rolled out to high-risk patients. There's been some shady business in the big sponsored trials re. low-risk patient groups that suggests there's insufficient benefit there.

As long as her book doesn't venture far past that territory, it's probably kosher.