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Marcus trusts his medical book more than Ayran and he is right to do so.
Let the reading of Chesterton’s Gateway commence! It’s available directly from the author Here and also Here on Amazon if you would like to join in.
I’d recommend getting that book to support the author, but if money is an issue and you would still like to do the reading with us, I believe the essays collected in it are public domain and can be found on sites like Project Gutenburg.