[Coda]

I wouldn't worry TOO terribly much. They only know where you work. They don't know your name, they don't know where you live, they don't know your phone number, and they don't seem to be the type to be coordinated enough to pull any sort of tricks to dig any of those things up. (That said, you did the right thing not going home -- means they didn't follow you there and find out where it is.) If you have any further trouble with this odd individual, contact the police via their non-emergency number; this kind of thing is understood well enough to have procedures for it. But I wouldn't expect to have any issues.

As for the bible itself, find someone who would appreciate the workmanship. That actually is a pretty nice gift for the right person.