I purchased it with great expectations. But it was a thorough waste of my time and money. The only problem/ riddle worth the name is the one on the cover, "who owns the fish" and it is widely being circulated on the Internet for the past many years. May be my expectation was too high. Of course I had expected at least a few more like the one mentioned above. However, the Title of the Book is EINSTEING'S RIDDLE - note that the RIDDLE is in singular - and there is at least one Riddle worth the...