Spencer Johnson wrote Who Moved My Cheese?Who Moved My Cheese? is written by Spencer Johnson. Spencer Johnson wrote The One Minute ManagerThe One Minute Manager was released 1981
[Human]: Do you have books written by Spencer Johnson? [Assistant]: He wrote Who Moved My Cheese? As well as The One Minute Manager. Have you heard of them? [Human]: Who Moved My Cheese sounds interesting. When was it released?  [Assistant]: That was release in 1998. Spencer Johnson is also a motivational speaker. [Human]: I heard he also wrote The One Minute Manager. Is that true? 
It is. That one was released in 1981.