Reference
Master Index
A complete map of every note in this knowledge base, organized by its ten domains. This index is the source of truth for navigation: if a note exists, it is linked below. The list mirrors the canonical Note Registry.
Tip
Looking for a definition instead of a note? Try the Glossary of IPA Terms. Looking only for styles? Use the Style Index.
#01: Introduction
- Home: the front door to the knowledge base
- What Is an IPA: the core definition
- IPA Family Tree shows how the styles relate
- How to Use This Knowledge Base: orientation and reading paths
#02: History
- History of IPAs: the full origin story
- Origins of Pale Ale: the ancestor style
- The October Beer Myth: separating legend from fact
- Hodgson and the East India Trade: the London brewer who started it
- Burton-on-Trent and Burton Pale Ale: the town that perfected pale ale
- IPA in the British Empire: export beer across the colonies
- Decline of IPA in Britain: the style's long fade at home
- IPA in Early America: early American pale ale
- The American Craft Beer Revolution: the movement that revived IPA
- Anchor Liberty Ale and the First Modern IPA: the 1975 turning point
- Rise of the West Coast IPA: bitterness as identity
- Origins of the Double IPA: bigger, hoppier, stronger
- The New England IPA Emergence: the hazy revolution
- Globalization of IPA: the style goes worldwide
- Modern IPA Diversification: the contemporary explosion of substyles
- The Future of IPA: where the style is heading
#03: Styles
- IPA Styles: the complete style map
- IPA Style Comparison Table puts the styles side by side
- English IPA: the traditional, malt-balanced original
- American IPA: the citrus-and-pine standard
- West Coast IPA: clear, bitter, dry
- New England IPA: soft, hazy, juicy
- Double IPA: high-strength, high-hop
- Triple IPA: the extreme end of the spectrum
- Session IPA: hop character at low ABV
- Black IPA: dark malt meets hop bitterness
- White IPA: IPA crossed with witbier
- Belgian IPA: IPA with expressive Belgian yeast
- Rye IPA: spicy rye in the grain bill
- Red IPA: caramel-malt amber base
- Brut IPA: bone-dry and champagne-like
- Milkshake IPA: lactose, fruit, and creaminess
- Cold IPA: lager yeast and a crisp finish
- Brett IPA: wild-yeast funk
- Sour IPA: tart kettle-soured hop beer
- India Pale Lager: the lagered cousin
- Specialty and Experimental IPAs: the fringe and the new
- BJCP and Style Guidelines: the formal style framework
#04: Ingredients
- Ingredients: the domain overview
- Hops: the soul of the IPA
- Hop Chemistry: what is inside a hop cone
- Alpha Acids and Bitterness: the source of bitter
- Hop Oils and Terpenes: the source of aroma
- Hop Terroir: how place shapes a hop
- Hop Growing Regions: where hops come from
- Hop Products and Formats: cones, pellets, extracts
- Cryo Hops and Lupulin Powder: concentrated hop products
- Citra: the tropical-citrus workhorse
- Mosaic: the complex, multi-note variety
- Cascade: the grapefruit pioneer
- Centennial, the "super Cascade"
- Simcoe: pine, passionfruit, and dank
- Amarillo: orange and floral
- Galaxy: intense Australian passionfruit
- Nelson Sauvin: the white-wine hop
- Sabro: coconut and stone fruit
- Strata: dank and tropical
- Noble and English Hops: the traditional aroma hops
- Hop Variety Index: the full hop reference
- Malt: the backbone of the beer
- Base Malts: the bulk fermentable
- Specialty Malts and Adjuncts: color, flavor, and body
- Yeast: the fermentation engine
- IPA Yeast Strains: the strains that shape IPA
- Water: the largest ingredient by volume
- Water Chemistry and the Sulfate-Chloride Ratio: tuning the water
#05: Brewing Guide
- Brewing Guide: the domain overview
- The IPA Brewing Process Overview: start to finish
- Recipe Formulation: designing an IPA
- Milling and the Grain Bill: preparing the grain
- Mashing: converting starch to sugar
- Lautering and Sparging: separating the wort
- The Boil: sterilizing and bittering
- Hop Additions and Timing: when to add hops
- Bittering, Flavor, and Aroma Hops: the roles of each addition
- Whirlpool and Hop Stand: post-boil aroma extraction
- Fermentation: turning wort into beer
- Dry Hopping: aroma without bitterness
- Double Dry Hopping: layering the aroma
- Hop Creep and Refermentation: the dry-hop fermentation risk
- Clarification and Haze Management: controlling clarity
- Carbonation and Packaging: finishing the beer
- Water Treatment for Brewing: building brewing water
- Homebrewing an IPA: the small-batch approach
- Scaling Up to Commercial Production: from kitchen to brewhouse
- West Coast IPA Recipe: a worked clear-and-bitter recipe
- New England IPA Recipe: a worked hazy recipe
- Double IPA Recipe: a worked high-strength recipe
#06: Science and Sensory
- Science and Sensory: the domain overview
- The Chemistry of Hop Bitterness: why hops taste bitter
- Isomerization of Alpha Acids: the heat reaction
- Hop Aroma Compounds: the molecules behind the smell
- Biotransformation: yeast-driven aroma change
- Thiols and Hop Burst: the tropical sulfur compounds
- Dry Hop Creep Explained: the science of refermentation
- Hop Haze and Colloidal Stability explains what makes a beer hazy
- IBU and Perceived Bitterness: measure versus sensation
- Beer Flavor Wheel: the vocabulary of flavor
- Off-Flavors in IPA: defects and their causes
- Hop Fade and Oxidation: why IPAs do not keep
- Tasting and Evaluating IPAs: structured assessment
- Sensory Training and Panels: building a trained palate
- The Science of Mouthfeel: body and texture
- Light-Struck Beer and Skunking: the light defect
#07: Drinking an IPA
- Drinking an IPA: the domain overview
- How to Taste an IPA: a step-by-step method
- Glassware for IPAs: choosing the right glass
- Serving Temperature: getting the temperature right
- IPA Freshness and Shelf Life: drink it fresh
- Reading an IPA Label: decoding the can
- Food Pairing with IPAs: matching food and hops
- IPA and Cheese Pairing: the cheese board
- Best Time and Occasion to Drink an IPA: context and occasion
- Regional Drinking Cultures: how IPA is drunk worldwide
- Draft vs Can vs Bottle: the packaging question
- Building an IPA Tasting Flight: designing a tasting
#08: Best IPAs
- Best IPAs: the domain overview
- How These Were Selected explains the selection methodology
- Best West Coast IPAs: top clear, bitter IPAs
- Best New England IPAs: top hazy IPAs
- Best Double IPAs: top high-strength IPAs
- Best English IPAs: top traditional IPAs
- Best Session IPAs: top low-ABV IPAs
- Best Black and Specialty IPAs: top dark and unusual IPAs
- Best Budget IPAs: top value picks
- Best IPAs by Region - United States: U.S. regional picks
- Best IPAs by Region - Europe: European picks
- Best IPAs by Region - Rest of World: picks from elsewhere
- Iconic IPAs That Defined the Style: the historic landmarks
- IPA Festivals and Competitions: where to taste and judge
#09: Industry and Culture
- Industry and Culture: the domain overview
- The Craft Beer Industry: the business landscape
- Landmark IPA Breweries: the breweries that mattered
- Key Figures in IPA History: the people behind the style
- The Business of Brewing an IPA: costs and economics
- IPA Branding and Label Art: design and identity
- Hop Contracts and the Hop Supply Chain: sourcing hops
- Beer Distribution and the Three-Tier System: getting beer to market
- Untappd and Beer Rating Culture: the social rating layer
- The Hype Beer Phenomenon: scarcity and demand
- IPA in Bars and Taprooms: the on-premise experience
- Sustainability in IPA Brewing: environmental impact
#10: Reference
- Reference: the domain hub
- Glossary of IPA Terms: the vocabulary
- Master Index: this note
- Style Index: the style-only index
- Timeline of IPA History: the chronology
- IPA Beer Statistics and Data: the numbers
- Recommended Reading and Resources: books and media
- Frequently Asked Questions: quick answers
#Continue Reading
- Home: the front door
- Style Index: the IPA style map
- Glossary of IPA Terms: the vocabulary of IPA
- How to Use This Knowledge Base: reading paths