Most players know a d20 when they see one and stop there. The Book of Dice goes further: 107 pages on where the seven standard dice come from, why they are shaped the way they are, and the maths that makes each one fair.
It covers the five Platonic solids and why polyhedral dice settled on those shapes, the geometry behind a d4, d8, d12 and d20, how probability actually distributes across 2d6 versus 1d20, and the history of dice before anyone called them "polyhedral." It is a reference for a table that wants to know why the dice work, not just how to roll them.
The book is a $19 PDF, laid out for print or screen, at rpgcreator.net.
Free things on the same site
Before spending anything, three things on rpgcreator.net cost nothing:
- The library: nine free booklets, the same standard as the paid book, on narrower topics.
- The character sheet: a free four-page D&D character sheet, in the browser or as a fillable PDF.
- The character app: build and manage a character without printing anything.
rpgcreator.net is ours. It's where the bigger books and the tools that don't fit on a dice roller live. Have a look, whether or not the book is for you.
