I am looking for a children’s book from the 1980s.  It was an over size, hard cover book, (not Richard Scarry, but illustrations remind me of him).  It was a science book for children – it contained information about the human body (reproduction, digestion, etc), also information about the earth and was richly illustrated.  I also remember on one page there were pictures of the sign language for the letters of the alphabet.

I would absolutely love to try and find this book for my own kids now.