Free, Open-Access Textbooks

Advanced COBOL

z/OS, CICS, DB2, and batch architecture — enterprise COBOL mastery

40 chapters · ~67h

Advanced Data Science

Deep learning, causal inference, and production ML systems at scale

39 chapters · ~57h

AI Ethics

Why algorithms discriminate — and what we can do about it

39 chapters · ~82h

AI Literacy

Understand AI without writing code — critical thinking for the AI-powered world

21 chapters · ~13h

AI & ML for Business

From prompt to production — AI strategy for MBAs and business leaders

40 chapters · ~80h

AI Engineering

From transformers to deployment — build production AI systems

40 chapters · ~53h

Algorithmic Addiction

How apps are designed to hijack your brain — and how to fight back

40 chapters · ~71h

American Government

How power actually works — institutions, elections, and the Constitution in practice

40 chapters · ~77h

Applied Psychology

The hidden forces shaping your decisions, habits, and relationships

40 chapters · ~52h

Assembly Language

What's really happening inside the machine — x86-64 and ARM64 from the ground up

40 chapters · ~27h

Blockchain & Crypto

The CS, economics, and law of blockchain — without trying to sell you anything

40 chapters · ~68h

Calculus

The mathematics of change — limits, derivatives, integrals, and series, built for intuition and application

40 chapters · ~51h

College Football Analytics

The data behind every fourth-down decision and upset pick

28 chapters · ~18h

Creator Economy

Turn content into a business — monetization beyond ad revenue

41 chapters · ~57h

Pattern Recognition

The hidden architecture connecting every field — seen from everywhere at once

43 chapters · ~92h

Data & Society

Who owns your data, who profits from it, and who gets hurt

40 chapters · ~71h

Data Viz with Python

See the data — perception science, design thinking, and the full Python viz stack

35 chapters · ~53h

Ethical Hacking

Learn to break in so you can lock it down — Kali, Metasploit, Burp Suite

41 chapters · ~58h

Fandom

How fans build culture, communities, and economies from the inside out

44 chapters · ~71h

History of Appalachia

Coal, culture, and resilience — the story America forgot to tell

42 chapters · ~69h

How Humans Get Stuck

The predictable ways knowledge goes wrong — and how to unstick

40 chapters · ~36h

Handling Confrontation

Stop avoiding hard conversations — frameworks that actually work

40 chapters · ~80h

How to Learn Anything

Evidence-based strategies for acquiring knowledge, skills, and expertise

38 chapters · ~54h

How Your House Works

Understand every system in your home — and never overpay for repairs

40 chapters · ~66h

IBM DB2

From first query to enterprise architecture — master IBM's flagship database

37 chapters · ~53h

Intermediate COBOL

From copybooks to CICS — master enterprise COBOL programming

54 chapters · ~44h

Intermediate Data Science

Bridging the gap from data analysis to production machine learning

36 chapters · ~39h

Intro CS Python

Learn to think like a programmer — from zero to confident coder in one textbook

27 chapters · ~13h

Intro to Data Science

From curiosity to code — Python, pandas, and your first real dataset

36 chapters · ~54h

Introductory Economics

How the world works — micro, macro, and the art of thinking about tradeoffs

40 chapters · ~12h

Introductory Statistics

Making sense of data in the age of AI — from descriptive stats to inference

28 chapters · ~47h

Learning COBOL

The 65-year-old language that still runs 95% of ATM transactions

42 chapters · ~64h

Prediction Markets

How crowds predict elections, economics, and world events

42 chapters · ~60h

Linear Algebra

The mathematics of everything — vectors, matrices, and the structure behind data, graphics, and ML

40 chapters · ~60h

Metacognition

The operating manual for your brain that school never gave you

28 chapters · ~52h

Media Literacy

Spot deepfakes, dismantle propaganda, and think for yourself

41 chapters · ~81h

NFL Analytics

Win probability, EPA, and the math behind every NFL play

28 chapters · ~16h

Nuclear Physics

From nuclear forces to neutron stars — a modern Krane for the 2020s

35 chapters · ~28h

Organic Chemistry

40 chapters · ~21h

Pascal Programming

The language designed to teach — from foundations to modern Object Pascal

40 chapters · ~43h

Physics of Music

Why certain chords feel good — the science of sound and emotion

48 chapters · ~75h

Political Analytics

The data behind polls, campaigns, and every election forecast

41 chapters · ~67h

Popular Psychology

What the science actually says about everything you think you know about the mind

40 chapters · ~21h

Practical Philosophy

How to live — philosophy as a tool for the questions that actually matter

38 chapters · ~63h

Basketball Analytics

Player tracking, shot quality models, and lineup optimization

31 chapters · ~30h

Soccer Analytics

Expected goals, tactical heatmaps, and the data revolution in football

30 chapters · ~43h

Propaganda

Understand the techniques of propaganda — and how to resist them

40 chapters · ~80h

Python for Business

Automate your reports and analyze data — no CS degree needed

40 chapters · ~40h

Quantum Mechanics

From wavefunctions to qubits — the most accurate theory in physics

40 chapters · ~66h

RegTech

AI, blockchain, and automation are rewriting financial compliance

40 chapters · ~59h

The Science of Cooking

Why recipes work — heat, chemistry, and technique from the molecule up

40 chapters · ~70h

Science of Seduction

Attraction, desire, and connection through psychology and sociology

45 chapters · ~60h

Sports Betting

Kelly criterion, market efficiency, and the math sharps don't share

42 chapters · ~63h

Architecture of Surveillance

From the Panopticon to predictive policing — how watching became an industry

40 chapters · ~54h

Science of Luck

Luck isn't random — the research on engineering your own serendipity

40 chapters · ~72h

Vibe Coding

Describe what you want. AI writes the code. Ship it.

42 chapters · ~58h

Video Game Design

40 chapters · ~36h

Why They Watch

The psychology of viral video — and 1,000 ideas for your next post

40 chapters · ~48h

Working with AI

Get 10x more from ChatGPT, Claude, and Copilot starting today

42 chapters · ~58h