Complex sentence: A Planetary Healer's Handbook (with artwork by Peter Max), which sold over 1 million copies worldwide, was the first holistic book published which cited (400) medical journal references and is notable for its coverage of living foods and enzyme nutrition.
Split into simpler sentences: A Planetary Healer's Handbook (with artwork by Peter Max), which sold over 1 million copies worldwide. It was the first holistic book published with medical journal references (400 are cited) and is notable for its coverage of living foods and enzyme nutrition.