Of the seven books from Piers Anthony's Incarnation of Immortality series, For Love of Evil is better than all in the series with the exception of On a Pale Horse. Not to say that it is worse than On a Pale Horse but it is as least as good. For Love of Evil is a thought provoking and finely written piece of work for this genre. I do feel that some area of the book was left sketchy jumping years in advance leaving it up to the reader's imagination to fill the left out parts. But considering that Piers Anthony compacted 800 years into 383 pages it is understandable why some descriptive lead-ins were omitted. Piers Anthony was in top form when writing this installment. He is also an atheist, by his own admission, but has still used a very original view of how the age old deities conduct business.
Piers Anthony's synopsis of Satan, AKA Parry, in For Love of Evil, is not necessarily evil, only evil by the accepted norms of the current society when the office is taken. Parry believes there is much evil in humanity that is none of his doing, and that the persons doing these atrocities slip though the bureaucratic cracks and end up in heaven. By the same turn people are going to hell for reasons that he does not believe to be sound. Because of these beliefs he creates a heaven in hell for these people, and sets out to try and work out a new set of rules with his counterpart who apparently is not paying attention.
For Love of Evil has a storyline that could be read as a stand alone book and the reader would not loose any of the storyline not having read the other six books in the Incarnation of Immortality series. Sadly number seven, An Eternity, was a let down for a series of books that gave us an interesting idea, what if the immortals are just everyday Joe's.