Someone is setting pipe bombs all over the place, mainly in government buildings, such as the library and the post office and some are far more deadly than others when a professor is murdered by a bomb placed in his car and another is almost blown to bits as well.
The catalyst is a book called 'Empty Planet', which is a work of Science Fiction, written by a female academic who used a male pseudonym. It was the only book she wrote. Naturally, Reid is familiar with it and tells the team that the story ends with 'the son killing his mother'. This is very predictable as the bomber is a young man and the author a middle-aged woman. Bomb expert Morgan is able to stop a detination or two but nobody can stop the inevitable confrontation between the author and the bomber whom he believes to be the mother who gave him up for adoption twenty-six years ago. Turns out she gave up a daughter but he intends to kill her anyway so that he can complete his fantasy and so make the ending of the book 'real' for him.
Deadly dull, wake me when it's over.