The Scariest Monster in the World by Lee Weatherly and Algy Craig Hall
The monster in this book is really scary. He doesn't brush his teeth so they are green and mossy, he doesn't bathe so his pillow is smelly and crusty, and he is really mean. Anytime the animals are near him, he yells at them to go away, or he tries to scare them off. But one day, as he is wandering in his mean moods, he gets the Hiccups!
After doing everything he can to get rid of them, but nothing he does works. Finally, the animals of the forest come to his aid and he learns how to get rid of his hiccups.
This is adorable! I love how the other animals are finally able to get rid of monster's hiccups!