Library

Self-authored textbooks, free to read.

Interactive books written and built from scratch — each one a complete course with its own study app, and each downloadable to keep offline. No paywall, no signup.

Quantitative Finance

The Mathematics of the Desk Read

A quant trader's textbook — from first principles to shipping models

Derives the complete mathematics behind a live market-analysis engine: probability and calculus through volatility, options pricing, dealer gamma, logistic models, backtest statistics and position sizing. Every result is derived by hand before it is used.

• 14 chapters + 4 appendices with worked examples and click-to-reveal solutions
• Interactive 3D figures and in-browser Python labs (no install)
• Adaptive flashcards, a Learn mode and a built-in AI tutor
• Companion white paper and a downloadable offline package

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Futures Licensing · NFA Series 3

Passing the Series 3

A complete textbook for the National Commodity Futures Examination

Futures Licensing · NFA Series 3

Passing the Series 3

A complete textbook for the National Commodity Futures Examination

Everything tested on the NFA Series 3 — futures theory, margin, hedging and basis, speculation, spreads, options and the full regulations block — with every chapter sized to what the topic is worth on the real exam blueprint.

• 17 chapters + 3 appendices, weighted to the exam blueprint
• 510-question bank: browse it, quiz by chapter, or drill 10 at a time
• Quick 10 mode with lifetime topic stats and a weak-topic drill
• Full timed 85 + 35 mock exam scored to the real 70%-per-part rule

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More volumes are in progress. Everything here is educational material, not financial or legal advice.