Generative book number · open standard
Example
GENBN
1337Z0R
site or service
2026
year
-
FIC
category
3 char
3 char
-
SCFI
subcategory
4 char
4 char
-
0004172
serial
An open standard for identifying books made with generative AI.
A GENBN says who made a book, when, and what kind it is.
The fields
| Field | Length | Holds |
|---|---|---|
| site / service | ≤ 15 | The platform, tool or press that generated the book. |
| year | 4 | The year the code was minted. |
| category | 3 | The broad kind of book. |
| subcategory | 4 | Narrows the category. |
| serial | 4+ | Begins with a zero, starts at 0001, and grows
a digit as needed. No special characters. |
0001→0999→
01000→09999999
no ceiling
Categories
FIC Fiction 14
- LITRLiterary / general
- MYSTMystery / crime
- THRLThriller / suspense
- ROMCRomance
- SCFIScience fiction
- FANTFantasy
- HORRHorror
- HISTHistorical fiction
- ADVNAdventure
- WESTWestern
- SPECSpeculative / other
- HUMRHumor / satire
- YAFNYoung adult fiction
- CHLDChildren's fiction
NFI Nonfiction (general) 6
- ESSYEssays
- TRUETrue crime
- CURRCurrent events / journalism
- POLIPolitics / government
- SOCLSocial issues
- CULTCulture / media
BIO Biography & memoir 4
- AUTOAutobiography / memoir
- LIFEBiography
- COLLCollective / group bios
- HISTHistorical figures
BIZ Business & economics 6
- ENTREntrepreneurship
- MGMTManagement / leadership
- FINCPersonal / corporate finance
- MKTGMarketing / sales
- ECONEconomics
- CARECareer / workplace
SEL Self-help & personal development 6
- HABTHabits / productivity
- MINDMindset / motivation
- RELARelationships
- SPIRSpiritual growth (secular)
- DISCDiscipline / willpower
- LIFELife design / purpose
HLT Health & fitness 6
- NUTRNutrition / diet
- FITNStrength / training
- MENTMental health
- MEDCMedical / condition-specific
- SLEPSleep / recovery
- LONGLongevity
SCI Science 6
- PHYSPhysics
- BIOLBiology
- CHEMChemistry
- ASTRAstronomy / space
- MATHMathematics
- ENVREnvironment / climate
TEC Technology & computing 6
- PROGProgramming / software
- AIXXAI / machine learning
- HARDHardware / makers
- CYBRSecurity / privacy
- NETWNetworks / systems
- FUTRFuture tech / speculation
HIS History 6
- ANCTAncient
- MEDVMedieval
- MODNModern
- MILTMilitary
- REGNRegional / national
- CIVLCivilization / world
REL Religion & spirituality 6
- CHRSChristianity
- ISLMIslam
- JUDMJudaism
- EASTEastern traditions
- COMPComparative
- MYSTMysticism / occult
PHI Philosophy 5
- ETHCEthics
- LOGCLogic / epistemology
- EXISExistential / meaning
- POLPPolitical philosophy
- ANCTAncient philosophy
EDU Education 5
- PEDGPedagogy / teaching
- HOMEHomeschool / parenting ed
- LANGLanguage learning
- STEMSTEM education
- STDYStudy skills
CKG Food & cooking 5
- RECPRecipes / cookbooks
- TECHTechnique / baking
- DIETDietary (keto vegan etc.)
- REGNRegional cuisine
- BEVRDrinks / coffee / wine
TRV Travel 4
- GUIDGuides
- MEMRTravel memoir
- ADVNAdventure travel
- REGNRegional
REF Reference 4
- DICTDictionaries / encyclopedias
- ALMNAlmanacs / yearbooks
- HOWTHow-to / manuals
- INDXIndexes / directories
POE Poetry 4
- LYRCLyric
- NARRNarrative
- ANTHAnthology
- FORMFormal / traditional
COM Comics & graphic 4
- SUPRSuperhero
- GNRLGeneral graphic novel
- MANGManga-style
- NFGNNonfiction graphic
ART Arts & design 6
- VISLVisual art
- DSGNDesign
- PHOTPhotography
- MUSCMusic
- PERFPerforming arts
- ARCHArchitecture
LAW Law 4
- CIVLCivil
- CRIMCriminal
- CONSConstitutional
- PRACPractice / how-to
SPO Sports & recreation 4
- TEAMTeam sports
- INDVIndividual sports
- OUTDOutdoor / hunting / fishing
- FITCCompetitive fitness
Registering a service
If you have a domain
Choose your code
Claim the code you want and prove you control the domain.
If you don’t
One is assigned
A code is assigned to you. You do not choose it.
One code per book. A GENBN is issued once and never reused.