Fact-checking on ND history with M

Hey all,

Has anyone read John Kryk's book "Natural Enemies: The Notre Dame-Michigan Football Feud"?

Notre Dame blog One Foot Down is citing the book as the source for a history post that basically says Yost was a complete a**hole to Notre Dame for no reason, and that Yost was possibly the most unethical coach in the history of pre-WWII football.

LINK

Can anyone confirm the "facts" they're using if you've read Kryk's book? Or are they completely making it up? This is probably totally inconsequential, but I haven't read the book so I don't know.