Rubáiyát of Omar Khayyám (Fitzgerald)
"Rubaiyat of Omar Khayyam (Persian: رباعیات عمر خیام). The Rubáiyát (Arabic: رباعیات) is a collection of poems, originally written in the Persian language and of which there are about a thousand, attributed to the Persian mathematician and astronomer Omar Khayyám (1048 – 1123). "Rubaiyat" (derived from the Arabic root word for 4) means "quatrains": verses of four lines." (summary from Wikipedia.)
Chapters
From LibriVox, read by volunteers and in the public domain. LibriVox page (opens librivox.org), the text (opens gutenberg.org), all files on the Internet Archive (opens archive.org).