
Have you ever found an animal you didn't know and wanted to know how to breed it and if it was worth it? Have you ever fought a mob without really knowing what is it really doing? Have you ever wanted a nice checklist to see if you've encountered all mobs in your world?
If you said yes, Universal Bestiary is exactly what you need.
By combining a Book and Leather, you can make yourself your own little book that will contain pages on all mobs that can ever be found in your world. There are 3 ways of unlocking the page for a specific mob:
You can also unlock pages even if you never have touched the book or isn't carrying it. And if you loose it, you can always get a new one and it'll have all your entries already unlocked.

Universal Bestiary supports all 46 vanilla mobs that can be seen in survival, as well as a number of mobs added by other mods, with more planned to be added. The currently supported mods are:

Mod spotlight by Trikzon (outdated supported mod list in it):
You are free to suggest new mods by making a issue in the issue tracker with a link to the mod, although be aware that I already have a big todo list to go through.