|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||yesterday||40.64||$22.47||You save $18.17|
|Amazon US||3 days ago||31.59||$22.47||You save $9.12|
E. Richard Churchill, Louis V. Loeschnig, and Muriel Mandell are authors of books in the No-Sweat Science series. They each have written several other science-related books for children and young adults.