You might think I bought this book for my son. And I did...sort of. He isn't quite old enough to fully enjoy the book so we read it together, mostly enjoying the fantastic "paper engineering" (it is too intricate to be called a mere 'pop-up book'), and sometimes I go through it myself; reconnecting with my childhood scouting and still-current love of Kipling.
This book is more than pretty artwork - although it has that in spades. The story of a boy growing up with wolves to be entirely human and finally choosing to leave the pack and jungle that was his home is still potent and emotional.
Amazon suggested the book was for ages 4 to 8 (which is a huge range in attention span and understanding, I must say) but I think an older audience will enjoy it more. I'd say ages 6 to ...well, I'm 42, so at least that old.