Books about the Unification Church?

I’ve been reading “A Libertarian Walks Into a Bear” and there’s been discussion about the Unification Church (aka the Moonies).

Can anyone recommend a book about their history? I tried to find one in the library catalog, but all I could find was memoirs from former members. Which sounds like they could be interesting, but I want a more comprehensive history of the organization and Sun Myung Moon.

Thanks for your help.