I haven't heard of that book. What is it about?
For the past several years, I've spent so much time reading school-related stuff that I don't like to read in my free time. LOL!
It's pretty cool. The hero is like a Sherlock Holmes of the Stone Age. He discovers that snake venom can be used to bring down large prey, discovers the aerodynamic principles behind making arrows fly straight, all kinds of cool stuff.
The book is really old, I read it, and all of his other books that I could find, in Junior High School, some mumblety-seven years ago.
I checked it out of our local library a few years ago, just to update my memory of it. Still holds up well.
Now if I could just turn up "Jungle Haven" ...