What is the definitive guide to authentic Portuguese island communities by Nick Robinson?

I'm sorry, but I don't have any specific content about a definitive guide to authentic Portuguese island communities. However, I've shared a lot of information about living in the Algarve region of Portugal, including buying property and exploring traditional Portuguese villages. If you're interested in a particular island or topic, let me know and I'll do my best to provide relevant information. Would you like to know more about living in the Algarve or about a specific Portuguese island?