About

Each book grows out of one of our YouTube channels, where the host covers the subject in shorter videos. The book is the complete reference: every chapter, every figure and every step in one place, so you can keep it and come back to it.

All our books are digital PDFs sold as a one-time purchase. There are no subscriptions and no physical shipping.

All Old Ledger Press books are digital PDFs sold as a one-time purchase. There are no subscriptions and nothing is shipped.

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