DH, who was a child in the 60s and early 70s, thinks he remembers reading a book about a boy who wanted to live as an American Indian so built a tepee, collected feathers for his headdress, learned how to start a fire without matches and lived an "Indian" life in parallel to his own.
DH thinks that there were illustrations in the style of technical drawings, unless he has imagined those too.
Any ideas?