Mind you, this is not a cookbook with one recipe per page on average. This is a book that contains articles - one per chapter - that introduce the reader to a clever technique (or more) to leverage the full potential of the embedded nature of Lua.
The topics range from scientific use to the application of Lua in game development or as a protocol language. But all of them focus not so much on the domain where the technique is applied, but rather on the underlying problem and why and how the introduced technique can help to solve it.
Just what the title says: full of gems, only ranging in sizes.