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How Booktronaut works

Short practical books you can finish in about 30-60 minutes. Ten Free Planet titles need no card.

What format are the books?

Free titles ship as HTML in the reader and downloadable PDF. Complete paid editions unlock in the same reader once they ship.

Can I read offline?

Download the PDF for free titles. Browser reading needs a connection for the universe view.

Free vs Complete

Starter / Lite editions are free on Free Planet. Complete editions are fuller paid books. Pre-order −30% means the Complete file is not ready yet - leave your email, no charge today.

Devices

Modern Chrome, Edge, Firefox, Safari. Prefer less motion or no WebGL? Use the lite catalog.

Refunds

When paid checkout is live, EU buyers get a 7-day refund path unless they consented to immediate delivery. See Withdrawal.

Who writes the books?

Booktronaut Press: human-edited short missions. See About.