Herodotus Audio Files: Book VIII: Part 11, Part 12, Part 13, Part 14, Part 15, Part 16, Part 17, Part 18, Part 19, Part 20, Part 21, Part 22

Online Text: https://archive.org/details/herodotuswitheng04herouoft/page/n27

But note that this text version, although in an easier-to-read format is not the same as the one used for the audio.  The audio uses this one:

http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0126%3Abook%3D8%3Achapter%3D1%3Asection%3D1

Aeschylus Audio Files: https://librivox.org/the-persians-by-aeschylus/

Online Text: http://www.gutenberg.org/files/8714/8714-h/8714-h.htm#link2H_4_0005