12 hours ago, Ratatata said:interesting ingredients and pairing of flavors.
After reading the reviews, it seems like Manresa, recommended by @blue_dolphin would be an excellent choice for you.
However, I live in Costa Rica where it is almost impossible to buy good cookbooks so I rely heavily on the web. I can highly recommend our own @Ann_T's blog for dishes from the very simple to the very elegant that would be at home in any fine dining establishment. Her recipes are all her own and highly reliable.
It sounds like you have a very discerning audience that you cook for once a year. I would be very interested in hearing about it and I hope that you take us with you in your preparations and your final product. Welcome to The Forum.