Booker’s 2025-04 is the “Phantom Pipes Batch,” the final release in the 2025 Booker’s collection, known for its high proof (around 126.4 proof/63.2% ABV) and robust flavors of caramel, vanilla, oak, and spice, named after mysterious, forgotten distillery pipes; it’s uncut, unfiltered, barrel-strength bourbon aged over seven years, delivering an intense, complex tasting experience.