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Titles released on 4/4/19, so probably won't be free after then.
Riley Mack and the Other Known Troublemakers by Chris Grabenstein
Elizabeth II: Life of a Monarch by Ruth Cowen
The Beautiful Brain by Hana Walker-Brown
https://www.audible.com/pd/Riley-Mack-and-the-Other-Known-Troublemakers-Audiobook/B07PDNL36Y
Titles released on 4/4/19, so probably won't be free after then.
Riley Mack and the Other Known Troublemakers by Chris Grabenstein
Elizabeth II: Life of a Monarch by Ruth Cowen
The Beautiful Brain by Hana Walker-Brown
https://www.audible.com/pd/Riley-Mack-and-the-Other-Known-Troublemakers-Audiobook/B07PDNL36Y