Catching Elephant is a theme by Andy Taylor
I’m not sure, just because I’m not sure which of the books I’ve read also have audio book versions of them.
If you can find them, I would definitely suggest anything by Dawkins (save for the God Delusion, I haven’t read that one - it might only interest you if you like militant atheism, I’m not a big fan,) Man’s Search for Meaning by Frankl, anything by Brian Cox that’s out, or by/on Richard Feynman.