If you're English, need to do wiring in a French house, and want it to be legal and safe, then this book is essential.
If you're already familiar with English wiring practice then the guide also explains the differences and the reasons for the differences. And, hey, they're sometimes good ones! It's easy to read and understand with many clear sketches and diagrams to guide you through the French regs.
The French names for various fittings and components are given to ease the job at the hardware store.