Five books by world writers and, yes, Alexa will read your Kindle books to you in her own voice. You can also ask Alexa to play your Audible audiobooks, and those will be read in the recorded narrator's voice.
https://smile.amazon.com/article/read-the-world?ref_=pe_1840220_406976050_sub_aucc_us_crm_041919_worldbookday