Right, there's a lot to be said for a functional, comprehensive, accurate, updated piece of documentation in the OS / software world.
I work with so many software vendors (certain Linux distros included) where documentation is regularly outdated, absurdly cryptic, and/or incomplete. After putting all that effort into development, you'd think organizations would want to get it documented clearly and properly.
FreeBSD gets an A+ in that area.
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As for the name, I think "FreeBSD Handbook" may not do it justice, but it's become something of a brand in the tech world. I'd hate to mess with that.