Substantial and informative, a writing course all on its own. Worth reading more than once. Each chapter contains as much information as some books I've read on writing. If you're like me and you're constantly referencing your own work for examples or deconstructing it as you go, not a book I'd take on vacation or plan to read over a weekend.

Valuable to screenwriters, novelists, game designers, and anyone intending to communicate via narrative/story—especially in the way that it, like so many other really good books on writing—helps expand and define the language and concepts used to discuss the art of writing.