The Flavor Bible — Karen Page & Andrew Dornenburg

This is not a recipe book — it's a reference guide to flavor compatibility. Look up any ingredient and find what it pairs with, ranked by affinity. Basil goes with tomatoes (obvious) but also with strawberries, chocolate, and watermelon (revelatory). Professional chefs use it to create new dishes; home cooks use it to improvise with whatever's in the fridge. It teaches the single most valuable cooking skill: understanding which flavors amplify each other and why.