The author Bruno Dieu is a FIDE Master and became French Correspondence Chess Champion in 2000. He has a rich experience in chess, having participated in various chess tournaments, both over the board and in correspondence.
It's fascinating that he has competed with notable experts and writers on the 1 Nc3, such as Dick Van Geet, Anker Aasum, and Harald Keilhack. The mention of a book being a token of his experience suggests that he has documented his insights and knowledge about this opening.
Overall, this is a most promising exploration for those interested in chess and this specific opening.
We are convinced you will enjoy the chess ride Bruno provided in his excellent researched book.