So, in the last year or so, we've found parts of magazines all around the library. By parts, I mean the back cover. Which has the barcode. Sometimes, only the barcode.
So there's a thief (or thieves) in the library, stealing magazines. It's usually the popular ones. Cosmo, people, US weekly...ones like that. Sometimes, there's an odd one. Dog Fancy, Dolls etc.
But considering our hours (we're usually open for 10 hours a day, except on Fridays and Saturdays), there's no real reason to steal one of the magazines. At least, no good reason I can think of.