This weekend at Mountain Bluff Zoo, Katy and Micah are Junior Researchers. The friends are watching the capuchin monkey group. The keeper is worried about one of the monkeys, a male named Milo who has been steadily gaining weight. Perhaps the kids can figure it out by closely observing his behavior. At first, Katy and Micah are stumped. But as they spend more time with the monkeys, will they solve the mystery? And, can they come up with some creative ideas to help Milo?

About the Author

Brenda Scott Royce is the author of more than 20 books for adults and children. Animals are her favorite subject to write about. She has worked as a chimpanzee keeper at an animal sanctuary and traveled on wildlife expeditions to Africa and South America. In her free time, she helps injured birds as a volunteer with SoCal Parrot Rescue.