Project Blue Book, commonly shortened to PBB, is a modern psilocybin mushroom variety associated with SV-10 and Bluey Vuitton genetics. Current mycology sources identify the cross as SV-10 × Bluey Vuitton, while community cultivation reports use the same lineage. The genetics stand out for their unusual fruiting characteristics. Grow reports describe large fruits, heavy flushes, and significant variation in appearance between different phenotypes. Some documented grows show dense, chunky forms with pronounced blue coloration, while other expressions can look noticeably different. Project Blue Book is a newer variety, so reliable public information remains limited compared with established Psilocybe cubensis varieties such as Golden Teacher or B+. Because of that, published potency figures are not sufficiently consistent to assign a verified potency percentage or standardized effect profile. For shoppers researching PBB online, the names Project Blue Book, PBB, and Blue Book may appear in discussions of this newer genetic line. The strongest documented information currently available points to its SV-10 × Bluey Vuitton lineage and its distinctive fruiting characteristics. Baked in Bushwick features curated psilocybin mushroom varieties for customers in Bushwick and surrounding Brooklyn neighborhoods.