SCP-4942
Link here
I really enjoy this one for two reasons
1 It is incredibly funny that you could find this book do the ritual to get the most useless little guy ever the person writing the containment procedures has a vague tone of knowing there are easier ways of getting better while describing the idiocy of this summoning
2 I! Love! When the foundation interacts with other groups! The fact that they probably could get the other books from the other organizations but it is easier to keep an agreement of we aren't gonna summon the fool and believing them! Even if it's not necessarily "help" it's nice whenever we get to see them working with others :)










