What is hyena butter and would it be appropriate to spread on toast? Why is giraffe saliva such a good lubricant? And how does some mollusk mucus work like a fishing pole? Not quite a solid but firmer than a liquid, slime is used by plants and animals for defense, movement, communication, and even reproduction—it is the glue that holds our world together. Surveying some fascinating (but not so cute and fuzzy) aspects of the animal kingdom, Nick Caruso and Dani Rabaiotti profile 80 organisms that ooze, drip, dribble, and splatter. Dozens of creatures are ranked according to sliminess, and humorous illustrations appear throughout.