I'm not sure if it is your issue or not, but when I searched for "red planet" your index entry says it's the Robert A. Heinlein novel, but the link to Librivox

I'm not sure if it is your issue or not, but when I searched for "red planet" your index entry says it's the Robert A. Heinlein novel, but the link to Librivox goes to the page for the William John Locke book.