> Two-hundred books were taken out, presumably without anyone having to log their names.

The article states that every book taken out was returned. I see two alternatives:

1. The staff conducted a full inventory a couple of weeks after the incident and confirmed that every book is still there. (By the way, at what rate are books smuggled out even during regular opening hours?)

2. The books that were taken out were borrowed against a library card using some sort of self-checkout station.

I find option 2 much more likely, which meant the names were logged.