Available now
Vol. I
Ball Python
Python regius
The most-kept snake in the world, finally kept properly. 40+ chapters — genetics, breeding, and health.
The Culebra Codex · Knowledge Hub
Know your animal
better than anyone.
Complete, interactive care guides — written and approved by the best keepers and breeders alive. Start with the most-kept snake on Earth: the Ball Python guide — $9.99 at launch (regularly $19.99).
Why the Codex
Most reptiles don't die from neglect. They die from confident, well-meaning, wrong advice.
- Care sheets two decades out of date.
- Forum advice that contradicts itself.
- No one who's actually done it at the highest level to learn from.
The Codex ends that.
Launch price · 50% off
Volume One · Available now
The Ball Python Guide
Python regius
The most-kept snake in the world finally has the guide it deserves. Forty-plus interactive chapters on husbandry, temperament, morph genetics, breeding, and health — the working knowledge of breeders running tens of thousands of animals.
It lives in the Codex, on any device, and travels with your account. Start reading free. Unlock every chapter for $9.99 — half off for launch — and keep every future edition for life.
- 40+ interactive chapters
- Full morph-genetics appendix
- Breeding & incubation, start to finish
- Health — catch what quietly kills them
- Reads on any device — no PDFs
- Free foundational chapters to start
$19.99$9.99one-time · lifetime access
The animal itself
This is what you're learning to keep.
Real footage from the collection — the animal the guide is written about, kept the way the guide teaches.
What you're getting
Not a care sheet. A complete, interactive guide.
Every Codex volume is built to the same standard — the depth a serious keeper actually needs, in a format built to be used.
01
Complete
Everything, in order: wild range, enclosure, feeding, temperament, genetics, breeding, and health. The whole animal — not a one-page checklist.
02
Interactive
Built to be used, not just read — diagrams, build specs, decision trees, and numbers that actually hold. It lives in the Codex on any device.
03
Expert-approved
Written by working breeders and signed off by master keepers and exotics vets. If it's in the guide, someone who's done it at scale stands behind it.
04
Always current
Versioned like software. Buy once and every future edition of your volume is free, forever — the guide gets better while you own it.
Who stands behind it
Written and approved by the best in the world.
A Codex guide isn't one person's opinion. Every volume is drafted by working breeders, then reviewed and approved by master keepers and exotic-animal veterinarians before it ships. The standard is simple: nothing goes in a guide unless someone who has kept and bred the animal at scale will put their name to it.
01
Written by breeders
Drafted by people producing these animals in real numbers — not bloggers, not AI, not pet-store care cards.
02
Reviewed by masters
Every volume is read and corrected by master keepers and exotics vets before a single reader sees it.
03
Field-tested
The husbandry in the book is the husbandry running in real collections right now — proven, not theorized.
Reviewed & approved to the standard of
Tom & Stacey Crutchfield
Five decades breeding rare boids, pythons & crocodilians
George Van Horn
Venomous specialist · Reptile World Serpentarium
Ty Park
Lifelong keeper & breeder · Iguanaland
Steve Angeli
Heloderma & venomous keeper
Braxton Warren
Founder · Citadel Culebra
The Library
A guide for every animal you keep.
The Ball Python guide is live now. Nine more are in production — written, reviewed, and approved to the same standard. Get on the list and we'll tell you the day yours drops.
Coming soon
Bearded Dragon
Pogona vitticeps
The 'beginner' lizard with genuinely advanced needs — lighting, UVB, and diet most owners get wrong.
Coming soon
Corn Snake
Pantherophis guttatus
The first snake, done right. Husbandry, morphs, and the small things that separate thriving from surviving.
Coming soon
Kenyan Sand Boa
Gongylophis colubrinus
Small, hardy, and endlessly underrated — a fossorial boa with a surprising amount to get right.
Coming soon
Boa Constrictor
Boa constrictor
A lifetime animal that demands a real plan — sizing, heat, and the long game of a large constrictor.
Coming soon
Russian Tortoise
Testudo horsfieldii
A fifty-year animal most people house wrong. Enclosures, diet, hydration, and brumation, settled.
Coming soon
Leopard Gecko
Eublepharis macularius
The gecko everyone starts with — and most people underfeed, under-heat, and under-house.
Coming soon
Crested Gecko
Correlophus ciliatus
Arboreal, no-heat, deceptively demanding. Humidity, diet, and the truth about 'easy' care sheets.
Coming soon
African Fat-Tailed Gecko
Hemitheconyx caudicinctus
The leopard gecko's humid-loving cousin — different climate, different rules, the same demand for detail.
Coming soon
King Snake
Lampropeltis getula
Bulletproof, beautiful, and built to eat. Housing, feeding, and keeping a serial cannibal solo.
The Masterclass
Go beyond the page. Learn from the masters.
The books make you a knowledgeable keeper. The Masterclass makes you a great one. The Art of Keeping Reptiles is a filmed masterclass taught by the people who defined the craft — Tom & Stacey Crutchfield, George Van Horn, Ty Park, and Steve Angeli, hosted by Braxton Warren.
- Forty filmed lessons — presentation, interview, e-book, and assessment
- Taught by living legends with decades at the highest level
- Citadel Culebra certification on completion
The Community
You don't keep alone. Join Culebra Connect.
Every guide points back to one place: Culebra Connect — the federation's private community of keepers, breeders, and master mentors. Post your animal, get answers from people who breed at scale, and reach the member-vetted directories the books reference.
- Ask the breeders and vets who wrote the guides
- Member-vetted vet, breeder & shop directories
- Spaces for every species and every skill level
The offer
Own one guide, or unlock them all.
Start free. Own the Ball Python guide for $9.99 — half off for launch. Or take the whole Codex — every guide, the day it drops.
Free
Free
Start the Ball Python guide today — foundational chapters open, advanced chapters locked.
- Foundational chapters — free forever
- Reads in the Codex on any device
- Just your email to start
- Upgrade anytime to unlock the rest
Launch price · 50% off
The E-book
$19.99$9.99one-time
Own the Ball Python guide — every chapter, every future edition, yours for good.
- Every chapter unlocked
- Lifetime access in the Codex
- Full genetics & breeding appendix
- All future editions of Volume One
Founder price · first 15,000
Membership
$49/mo
The entire Codex — every guide, plus courses and the Culebra Connect community.
- Every Care Library volume — unlocked
- New volumes the day they drop
- Full Codex: courses, guides, the library
- Culebra Connect community — keepers, breeders & mentors
- Founder price locked for life · cancel anytime
Free access
Start reading the Ball Python guide — free.
Drop your email and we'll open your free copy in the Codex. Keep the free chapters forever, unlock the rest whenever you want.
Before you start
Common questions.
Yes. It's 40+ interactive chapters covering the whole animal — wild range, enclosure, feeding, temperament, full morph genetics, breeding and incubation, and a deep health section. It works as a complete beginner's guide and as a reference advanced keepers and breeders actually keep open.
Every chapter of the Ball Python guide, unlocked for life, reading in the Codex on any device — plus every future edition of that volume, free. It's a one-time purchase, not a subscription. $9.99 is the launch price (regularly $19.99).
They're in production now — written by breeders and going through master-keeper review. Release dates vary by volume, so hit 'Notify me' on any animal in the library and we'll email you the day it drops.
Working breeders draft each volume, then master keepers and exotic-animal vets review and approve it before release. Nothing ships unless someone who's kept and bred the animal at scale will put their name to it.
Buying a guide (Ball Python is $9.99 at launch, regularly $19.99) gets you that one volume for life. Membership ($49/mo — founder price for the first 15,000, locked for life) opens every volume of the Care Library plus the full Codex: courses, guides, and the library. Cancel anytime.
No. It lives in the Codex, reads on any device, and travels with your account — your progress and anything you unlock follow you everywhere. Your email is your account.
The Culebra Codex
Start with the Ball Python guide tonight.
Free to start. $9.99 to own it (was $19.99). $49/mo for the entire Codex.