I was traveling in Corsica summer 2001. I had bought this guide and the Insight guide about Corsica. Together they was a very good match.LP's book have a good diving and walking section. The walking section covers the famous GR20 route in particular. The diving section contains a lot about the diving possibilities and where the best dives are.There are a lot of small villages in Corsica. Many of them is not mentioned in LP. So don't forget to explore.