Programming in Lua (second edition)

Programming in Lua
by Roberto Ierusalimschy
Lua.org, March 2006
ISBN 85-903798-2-5

This is a detailed and authoritative introduction to all aspects of Lua programming, by Lua's chief architect. The second edition updates the text to Lua 5.1 and brings substantial new material.

The first edition, which was aimed at Lua 5.0 and remains largely relevant, is available online.