Perhaps Edgar Allen Poe's most famous poem, the "Raven" is a macabre exploration of a man, his memories of Lenore, and the black bird that interrupts his studies on a dark December night, with tap-tap-tapping at his chamber door. (Summary by Hugh)
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).