Bloody hell. "My Friend Mr Leakey" (by titan of population genetics, and occasional children's author, JBS Haldane) is back in print. Top google hit is this one, oddly, but I'm sure other retailers are available.
Part of it can be found here, and there might be a PDF with illustrations if you dig about. This is an absolutely delightful book, and as it's been out of print since about 1973 I'm very pleased to see it reappear.
Allegedly it was the first appearance in print of his famous saying "The Universe is not only queerer than we suppose, but queerer than we can suppose."
Now, I have an old copy . . . do I want to buy another one simply to lend people? Decision, decisions.