In the wake of its success, Ísak published a deluge of poetry, short story collections, novels, and a memoir.
Ísak has written lyrics, and his poetry has been performed to music,[3] and his work has been anthologised abroad in publications such as The Cafe Review (trans.
[4] His work, as both poet and proseist, is characterised by surreal and absurd descriptions of everyday life, as well as self-deprecating humour, as in his poem Skáld-Pabbi.
In 2011, his tenth poetry book Rennur upp um nótt (It Comes Up at Night; 2009) was nominated to the Nordic Council Literature Prize.
After a 9-year poetry hiatus, Harðarson released a book of poems entitled Ellefti snertur af yfirsýn (2018),[6] followed by a collection of absurdist short stories Hitinn á vaxmyndasafninu (The heat in the wax museum) 2021.