Aminatou Sow and Ann Friedman call each other every week to catch up, gossip, support, and love one another. In doing so, they've created the podcast Call Your Girlfriend, where no topic is off-limits. Big Friendship: How We Keep Each Other Close (which gets released on 14 July) will bring a smile to your face, remind you why you love your friends (and sometimes get angry with them too!) and make you want to call your girlfriend.