When singer, musician, and broadcast journalist Malka Marom had the opportunity to interview Joni Mitchell in 1973, she was eager to reconnect with the performer she'd first met late one night in 1966 at a Yorkville coffeehouse. More conversations followed over the next four decades of friendship, and it was only after Joni and Malka completed their most recent recorded interview, in 2012, that Malka discovered the heart of their discussions: the...