One Improvement could be to link it with API:

make the script lookup if the homin have all materials used in a recipe together and show it in the recipe list with an emblem or an icon or make the name of the Recipe i.e. green!

Also please add some more grafiks to the recipe book
- icons of material?
- a simulated "item info" box that looking like the ingame one if you make right click and "INFO" of the item. (after all stats were added manually)