Title: Bohemian Wine - Joanne Harris - book
Summary :
During three wonderful summers spent with his grandparents, young Jay Mackintosh met a very mysterious man: Joe. This enigmatic character transformed reality into an exuberant party. Above all, he made a special wine, each sip of which was a magical elixir. Joe disappeared, and this world suddenly vanished. That was fifteen years ago, but the memory still haunts him. Since then, Jay has become a famous writer. But, lacking inspiration, he willingly indulges in drinking... until the day a real estate ad leads him on the trail of his past. The castle for sale strangely resembles a place his friend had described to him...