It seems to me that there is a valedictory quality in Pratchett’s last three books. Of these, Unseen Academicals is the weakest. But Pratchett has not used the wizards, in most books, for more serious exploration of humanity, but rather has used them primarily on comic parody. I Shall Wear Midnight does for the witches of Disc world what UA does for the wizards. We get cameo appearances of almost all the witches in the series—including the long-missing Eskarina Smith. In my opinion, this book is stylistically the best Pratchett has ever written. His ability to give a truly terrifying form to our all too easy tendency to scapegoat rather than accepting responsibility is magnificent. I found this book made me distinctly uneasy so powerful is the villain. Snuff is the valedictory book for the watch series, which explains the clever use of cameos of most members of the watch. But it is also shows, in my opinion, the brilliant evolution of the three major characters of this series: Sam Vimes, Havelock Vetinari and Sybil Rankin Vimes.
Sybil achieves her full, three-dimensional characterization for the first time in this book. Pratchett has become comfortable with portraying her femininity as well as her intellectual strength. Sybil is no longer the “loony” rich spinster who kept dragons of GG. He developed her character slowly, moving her from a semi-comic character (eg. The aria in TFE), through her ability to care for Sam and to be a good mother to young Sam. She has an awareness and sense of responsibility that is sadly lacking in most members of the wealthy and/or noble class. She encourages Sam, in this book for the first time, to be a policeman (pursuing those who treat goblins as vermin). She also deliberately sends him to get the “Bennett sisters” to recognize their own worth as women. In this book we see Sybil, for the first time, as a sexual woman. It is, I think, significant that it is Sybil (with Vetinari’s connivance) who forces Sam to take time for a “vacation” at the family estate. She is truly the higher power. Although Sam rescues them, and Vetinari follows his lead in protecting the goblins as a sentient species. it is Sybil with her concert, rather than Vetinari or Sam, who changes the world in a way that only she is capable of doing.
Havelock Vetinari has also evolved over the years represented in the series to the complex character of this book. Chronologically, the brilliant school boy assassin of Night Watch who became the cynical but effective Patrician of the early Watch books, has finally become a human being rather than an elaborate plot device that set Sam (frequently by indirection) problems to solve. Vetinari began to change (after being shot, poisoned, nearly tried for treason) from the aloof, cynical observer of humanity into the still brilliant but now far more complex human who appears in Snuff.
The valedictory quality of this book, however, is most apparent in the way Pratchett has developed the character of Sam. Over and over, Pratchett has Sam acknowledge that he’s not as young as he used to be, that he tires more easily and needs rest while other, younger Constables do the paperwork. Sam was, as Sybil first noted, someone who wanted to arrest the gods for not doing it right, and he still exhibits that commitment to moral right (rather than just the law) in this book. And he dominates the book in volume and is just as active (steering the riverboat to safety, etc.) as ever. But Sam is some six to ten years older than when we last saw him in Thud!, and it shows.
Pratchett deliberately and brilliantly weaves almost all the watch characters from the whole series into cameo appearances in this novel. Most of them have brief but characteristic appearances, but Colon and Nobby—who were with Sam from the beginning—undergo changes that give them more human (or goblin) complexity than they have ever had before.
If I had to choose what Pratchett seems to use as the leitmotif of his satiric work, I think it is summed up in Granny’s comment to Pastor Oates (in CJ) that “…sin, young man, is when you treat people as things. Including yourself. That’s what sin is.” Even the “lighter novels” such as Reaper Man deal, in some ways, with this theme. And in the early novels, when Pratchett is writing almost straight parody, there are already hints of this philosophical stance. Most of the non-watch books (Truth, MR, GP, MM) have a similar underlying foundation, though it is less apparent than in the witches and watch series. He deserves to be regarded, as Publisher’s Weekly said of him, “Pratchett . . . should be regarded as one of the more significant contemporary English language satirists.” I would go further and assert that he is one of the greatest English satirists and skilled novelists of English or American literature.