Extinct Animals: An Encyclopedia of Species that Have Disappeared during Human History, 1st Ed.
South Sea adventure by Price, Willard . Red Fox, 2012
Amazon Adventure, by Willard Price, 1949 Hardcover
I read this as a child. Fascinating to see how much of the content in his children's adventure stories (That I LOVE and own all of!) is based on events in his own life or that of people he met in his travels.
The first authorized Willard Price book by Anthony McGowan, featuring Roger and Hal's children, Amazon and Frazer, in a leopard adventure.
My childhood bible....loved this book