I picked up a couple of new zoo history books for my collection last weekend at a second-hand book store, including one from Sigvard Berggren, but not the one
@snowleopard and
@Designaka have, it is called
Freedom Forest and was published 1962. THis one, which I think is the first book from Berggren, seems to focus on his time as an animal-collector in Africa, with a little on setting up Boras. Is there a bit of a series of books about Boras by Berggren, sort of a Swedish version of Durrell?
I also got
Some of Our Best Friends are Animals, on Cricket St. Thomas (UK), which looks like another interesting read, although flicking through it I see there is a photo of a rhea labelled "Emu"...