Bjarki Mar Karlsson (b. 1965) is a poet, linguist, and systems analyst. His first poetry collection, "Arleysi alda", won the Bokmenntaverlaun Tomasar Gumundssonar (Tomas Gumundsson Award) for 2013. and the Bokmenntaverlaun starfsfolks bokaverslana in the poetry category in the same year. The book was Iceland's best-selling poetry collection in 2013.

Can we draw the following conclusion?
He wrote the book in 2012
It's impossible to say