I read the first in the Vicky Bliss series, Borrower of the Night, written in the 1970s. I followed that with the most recent in the series, The Laughter of Dead Kings published in 2008. I discovered that the protagonist does not age significantly over the forty-year gap Interesting strategy for writing a series. Not at all like the Amelia Peabody series in which the protagonist ages along with the passing time.