This is the title of a book written by John Pollack. It is recommended for all those who feel an urgent need to know the difference between a pun and a play on words. Mr Pollack won the 1995 O.Henry Pun-Off World Championships and so qualifies as an expert in the field. Among his lesser achievements, he was also a speechwriter for Bill Clinton.
A birthday gift to me from my beloved, in case you wanted to know.
Source: John Pollack, The Pun Also Rises, Graham Books (USA), 2011.