Here's the first book: Did You Say Pears? By Arlene Alda. I highly recommend it. It is about homonyms. The photographs are very well taken, showing each object clearly. I don't know about you but, many times that is the problem with good books of this sort. The pictures are not to the point. I mean to say that they don't show the one item they are portraying. In this particular book the pictures are clear, simple and beautiful, I think.
Her website is: http://www.arlenealda.com/.