These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Freud Was Right: The Pocket edition of The Serpent sports a buffet of phallic symbols on the cover, thus accurately underscoring the novel's sadomasochistic elements.
Genius Bonus: One member of the Fantasywithbite LiveJournal community described the world-building in this series as "catastrophic," but this defect is the result of Gaskell's reliance on the reader's knowledge of unorthodox prehistory. The sources in the first two books' bibliography can point the confused reader in the right direction. note To give one example, the titular serpent and dragon of the first two novels are the archetypal reptiles from various myths: the serpent in the Garden of Eden story, the Supreme Seven-headed Serpent from The Lost Continent of Mu, Quetzalcoatl, the Pelasgian serpent, etc. These titles may also refer to the reptilian Zerd.
Iron Woobie: Cija can endure anything: kidnapping, rape, war, arranged marriage....
MST3K Mantra: Abandon hope, all ye who enter this series expecting a storyline based on accurate prehistory.
Squick: Be prepared for rape and bestiality if you decide to read these novels.
Unfortunate Implications: In The Dragon, a stranger sexually abuses Cija during her journey, but Cija refuses to call it rape because she claims to enjoy the experience.