Stig of the Dump

A 1001 CBYMRBYGU. I'd never heard a whisper about this book here in the US and that is very sad to me. Barney discovers a caveman (caveboy?) named Stig living in the dump near his grandmother's home and together the two have an entire book of fun adventures. Is Stig real or just a wonderful madeup friend? Who knows? And it doesn't really matter; it just adds to the fun.