Samples
Books in the public domain or under an open licence, made into lectures with the settings shown on each page and left as they came out. Every book comes at five levels, in English, Russian and Spanish, with the drawings in two looks.
Relativity: The Special and General Theory
Einstein’s own account of relativity, written in 1916 for readers without higher mathematics: what space, time and motion mean once the speed of light is the same for everyone.
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Alice's Adventures in a Differentiable Wonderland
A modern textbook on how neural networks really work, from tensors and gradients to transformers. The first three chapters lay the ground: what the book is about, the linear algebra and calculus a network runs on, gradient descent, and what a dataset and a loss function are.
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The Mathematical Principles of Natural Philosophy
The book that founded physics. Its opening chapter defines mass, momentum and force, and asks what it means to move at all: absolute and relative time, space and motion, with the spinning bucket and the two globes on a cord.
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Collected Papers of Srinivasa Ramanujan
The first paper the self-taught genius ever published, written in Madras at 23: strange patterns in the Bernoulli numbers, the numbers behind sums of powers. Most of his claims are true, some are guesses, and one is false; the lectures show which is which.
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The Principles of Chemistry
The textbook in which Mendeleev first set out his periodic law, in its last edition from his lifetime. Its Introduction asks what changes when one substance turns into another and what stays the same: the weight on Lavoisier's balance, the elements, the fixed proportions in which they combine.
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Dive into Deep Learning
The open textbook used in hundreds of university courses on neural networks. Its first chapter explains what it means for a program to learn from data: models, losses, optimisation, the kinds of learning problems, and how deep learning came to win.
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College Physics
The free textbook used by millions of first-year physics students. Its first chapter is about how physics measures the world: units, powers of ten, converting one unit into another, accuracy, significant figures and quick estimates.
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