Human Body Detectives Merrin and Pearl are at it again. Their magical ability to jump into people's bodies and explore their systems (digestive, skeletal, nervous ( June 2014), circulatory, and immune) combines science with their fun adventures to help kids understand their anatomy and how their bodies work. In The Lucky Escape, Merrin and Pearl explore their little brother, Robbie's, digestive system because they have to get a penny that he swallowed Along the way, they slide down his esophagus, bump in to gas bubbles, and learn up close about the functions of the stomach and intestines, and so much more. In the end, they not only get the penny, but they also get a firsthand lesson on the functions of the digestive system. The Lucky Escape is one of five stories featured in the Human Body Detectives series, along with Battle with the Bugs, A Heart Pumping Adventure, Osteoblasts to the Rescue, and Brainiacs, debuting in June 2014.