§ Academy · 5 live
The reference, not the lecture.
A permanent academic-reference layer — a Great Casebook of real decisions, Problem Books with full solutions, a Document Room, a Model Library, and Primary Sources. All five collections are open.
Collections
Five reference collections, all open.
The Great Casebook
Real decisions under real constraints — business, cities, and empires — each read as Situation, Options, Decision, Result, Lessons.
Open →Problem Books
Canonical problems with full worked solutions across economics, finance, mathematics, real estate, strategy, and statistics.
Open →The Document Room
Annotated real-world documents — term sheets, contracts, filings — read line by line.
Open →The Model Library
Annotated reference financial and quantitative models with downloadable spreadsheets.
Open →Primary Sources Academy
The founding texts of each field, presented with scholarly context and guided readings.
Open →The Academy is a reference layer, distinct from the courses and the Library. Everything here is free to read, hand-authored, bilingual, and cross-linked to the courses and Atlas.