Backstabbing. Duplicitous. Paranoid. Scheming. Treacherous. Self-serving. Cowardly. You name it, the term can probably be applied to the skaven, the giant ratmen of the Warhammer world.
The Grey Seer Thanquol probably represents all that is nasty about the skaven, thus in his mind, is truly a fine specimen of skavenhood. He becomes one of those horrible villains that you just like to read about and see him come undone.
Having narrowly survived his unsought adventures on the tropical island of Lustria, Thanquol, in his never-ending quest for self-advancement, finds himself thrust unwillingly into war against the engineer dwarves of Karak Angkul. The dwarves are a particularly hated enemy of Thanquol's, courtesy of the dwarven Slayer, Gotrek, aided by his human rememberer, Felix, having previously thwarted Thanquol's plans in the past.
Thanquol was first created by William King in the early Gotrek & Felix novels, before being continued in that series by Nathan Long. But it was C. L. Werner who was given the task of creating the spin-off series, Thanquol & Boneripper. The Grey Seer has gone through several rat-ogre bodyguards, all called Boneripper, and now the skaven engineers of Clan Skryre have gifted him with the re-animated remains of the original Boneripper.
One of the things I enjoy about the skaven is the technology emerging out of Clan Skryre, which has a steampunk feel to it. That of the dwarves has a similar feel, although not powered by the corrupting warpstone as so much of the Skaven technology is. So it was interesting to see the two clashing once more.
Werner has taken that existing character of Thanquol and expanded it while remaining true to the original. In fairness, the constant changing of Thanquol's attitudes to suit the immediate situation was laid on a little thick at time. But nonetheless, in Thanquol's Doom the story of Thanquol continues and even deepens a little.