|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon US||3 days ago||16.55||$11.38||You save $5.17|
|Book Depository US||yesterday||12.46||$11.38||You save $1.08|
Jennifer S. Holland is a contributing writer for National Geographic. She has also written for, among others, The Discovery Channel, NPR, and The New York Times, specializing in science and natural history.