I loved the Harley book by Hunter, but I don't really have another to compare it to. Regardless, reading about Harley should be mandatory for anybody who wants to call themselves a Buckeye fan. We revere Archie Griffin - and deservedly so. Without Harley though, there's probably no Archie Griffin, no Ohio State football and no BuckeyePlanet. All of this grew at least in some small part out of what that man did on the football fields of Columbus.
The 1968 book is great too - especially for somebody like me who was born a generation too late to witness that season. I'd be interested to hear a take on it from somebody who followed the team that year. It seems like it would still be a good read from that perspective too. Nowadays hear everything about our team almost as it takes place. That probably wasn't nearly the case back then, and this book seems to have a lot of that kind of information and storytelling. The only problem I saw with the 1968 book is that it is rife with errors - the publisher really dropped the ball in editing.