The book doesn't yet contain recipes, but when it does, we will be
able to get things out of it to use in the non-improv crafting system
(to be implemented).
This is the start of being able to implement following in a way that
works for NPCs, but it isn't finished yet. It does mean NPCs can do
things like climb immediately, and will make it far simpler for NPCs
to do other player-like actions in the future.
