6 books • 2 series
Human Body Detectives Book Collection (Human Body Detective Collection, #6)
Brainiacs (Human Body Detectives, #5)
Osteoblasts to the Rescue (Human Body Detectives, #4)
A Heart Pumping Adventure (Human Body Detectives, #3)
Battle with the Bugs (Human Body Detectives, #2)
The Lucky Escape (Human Body Detectives, #1)