Andrew Offutt wrote the Cormac books and David C. Smith and Richard Tierney wrote the Red Sonja spin-offs.

Unimpressed
I found this horribly unimpressive. The movie should have been named 30 Days of Hiding from Vampires. The passage of time meant nothing. (As evidenced by the fact that only two titles indicating the passage of time ever appeared.) The vampires appeared to wipe out the entire town in the first 24-72 hours…