Giving my article the same title as a published book by another author
I'll be perfectly honest - if I was in that subfield, I would be extremely annoyed in having two works with the same title - simple search for the works would be always troublesome, mentioning one of those works during a talk would always require a digression, etc. 

All of that would distract other researchers from the results, especially for the paper considering that it was published later. Ultimately it is not inconceivable that referee (whoever it might be) demands the change of the title.

Bottom line - I would try to think another witty title. :)