Are any of Arius' writings extant? In 325 CE, following the defeat of Arius at the Council of Nicea, Emperor Constantine the Great went on a campaign of book burning to eradicate all memory of Arius and his beliefs:

After the First Council of Nicea (325 CE), Roman emperor Constantine the Great issued an edict against nontrinitarian Arians which included a prescription for systematic book-burning:
&quot;In addition, if any writing composed by Arius should be found, it should be handed over to the flames, so that not only will the wickedness of his teaching be obliterated, but nothing will be left even to remind anyone of him. And I hereby make a public order, that if someone should be discovered to have hidden a writing composed by Arius, and not to have immediately brought it forward and destroyed it by fire, his penalty shall be death. As soon as he is discovered in this offense, he shall be submitted for capital punishment.....&quot;[3]
According to Elaine Pagels, &quot;In AD 367, Athanasius, the zealous bishop of Alexandria... issued an Easter letter in which he demanded that Egyptian monks destroy all such unacceptable writings, except for those he specifically listed as 'acceptable' even 'canonical'—a list that constitutes the present 'New Testament'&quot;.[4] (Pagels cites Athanasius's Paschal letter (letter 39) for 367 CE, which prescribes a canon but does not explicitly order monks to destroy excluded works.[5][original research?]) Heretical texts do not turn up as palimpsests, scraped clean and overwritten, as do many texts of Classical antiquity. According to author Rebecca Knuth, multitudes of early Christian texts have been as thoroughly &quot;destroyed&quot; as if they had been publicly burnt.[6]

The great Alexandrian library was destroyed under mysterious circumstances around that time.
So my thought is that it might be impossible to get my hands on Arius' writings. Is it? Or have any of his words survived?
Yes. As St. Alphonsus of Liguori writes in "Article 2: The Arian Heresy" §8 of his The History of Heresies p. 56:


  Noel Alexander says that these
  errors [of Arius] are taken from an impious work he wrote, called Thalia, and from an Epistle of his to St.
  Alexander, referred to by St. Athanasius, and from the Synodical Epistle of the Council of Nice, quoted by
  Socrates, St. Epiphanius, and Theodoret.