These are m4a files, simply a different type of audio file format.
m4a files can be played in an Apple device, on VLC media player or to get the exact same files in MP3 format visit this Lit2Go web site. Each file can be downloaded or listened directly online.
Many of our files are compressed to make download and uploading easier. To open these files or extracted the compressed files we use 7zip. You can download it for PCs here.
Enjoy your classic literature and feel free to visit our Reading Classics folder and download any of our growing list of classics.
Sagely Fox