A joke tweet about the gaming craze Fortnite from a Scottish island library has become a social media hit.
Orkney Library already has a big following for its off-the-wall use of Twitter.
The latest thread started by saying children kept asking for books about Fortnite, but staff had never heard of it so asked what it was.
However, the punch line at the end of the five-tweet thread has now had more than 23,000 likes.
Fortnite is a hugely popular game that can be played on most devices, including mobile phones, tablets and consoles.
Orkney Library's first tweet on Monday said: "So over the last few months kids keep coming into the library asking if we have any books about this thing Fortnight. We don't and I'd never heard of it so I tried asking what it was.
End of Twitter post by @OrkneyLibrary
It then said: "Is it a film? No. A cartoon? No. An game, like Pokémon or something? Yeah kinda. Nobody could tell me what all the fuss was about.
"Then today a man came in to borrow some Lee Child books and he had his son with him. It said #Fortnite on his T-shirt."
End of Twitter post 2 by @OrkneyLibrary
The thread continued: "While his dad looked through our Lee Child books (he was a huge fan so he was re-reading the series) I asked the boy to explain Fortnite to me.
"And he did. He told me all about it. He taught me what nobody else had been able to teach me. And now I know two things.
End of Twitter post 3 by @OrkneyLibrary
"Firstly, I know now that Fortnite is an online video game that was created in 2017 and already has more than 125 million players worldwide. Apparently it's very addictive.
"And secondly I learned that...
End of Twitter post 4 by @OrkneyLibrary
"The only boy who could ever teach me, was the son of a Reacher fan."
End of Twitter post 5 by @OrkneyLibrary
The unexpected punch line - referring to Lee Child' action character Jack Reacher and the lyric of Dusty Springfield's song Song of a Preacher Man - won over Twitter.
End of Twitter post by @piano_tinkler
On Tuesday, the library tweeted: "Okay that's enough now. The notifications from yesterday's thread have gone off the scale. By far our biggest tweet so far.
"Thank you for all the likes, retweets, follows and kind comments about our very silly pun. You are all lovely. *goes off to lie in a darkened room*"
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