I think a number of these puzzle books are not present in my Martin Gardner collection. I get a lot of input on MG as this is his centennial year. Of course, he is known for his contributions to the skeptics movement as well as his expertise as a magician and his annotated publications of classic works, but it is still his role in the area of mathematical recreations and popularization that garners the lion's share of devotion. Though an amateur without professional credentials or expertise, professional mathematicians consider him one of the most important mathematical figures of the 20th century.
When I ponder this, I am very moved. These things matter.