Books with monsters who are friends?

Give me literally ANYTHING. Aliens, shapeshifters, demons, angels, dragons, ghosts, mythological beasts, cryptids, not-so imaginary friends, werewolves. IDC if relationships are platonic or familial or romantic or whatever, or what age group it's directed at, or what the genre is. I just really wanna read about some friendly monsters. Especially caring friendly monsters, protecting or taking care of their human buddies, ect. There can also be unfriendly monsters, as long as at least one of them is chill.