Yes... the EGW estate has over 40 books that you can download from the link below. The quality of the audio has been improved if you were not happy before. Last week I started the Great Controversy.
https://egwwritings.org/singleframe.php#A few years ago I purchased a Bible on mp3 cd's for around $17.00 that I have also put on my phone.You can now find them cheaper if you'll look around.
I also found John Bunyan's books
Pilgrims Progress and
Grace Abounding to the Chief of Sinners for free. However, since these are free books done by volunteers at home the quality is a little lacking but I don't mind.
Steps to Christ is also alvailable for free on the same website, however, the audio quality at the above link for the EGW Estate is superior.