So what is different in The Master's Daughter?

The Master's Daughter series starts approximately seventeen years after the events of Danse Macabre. Danse Macabre, incidentally, is my point of departure from canon, since that was the most recent book when I began the series. Events of the books after DM may be hinted at, but may also be contradicted by MD fanon.

The main departure from canon, obviously, is the existence of Jean-Claude and Anita's daughter, Marvelle "Mara" Blake. I've also played with some things Laurell hinted at but never elaborated upon, like the bigotry facing preternaturals among human society and "Vlad syndrome" being the fastest-rising birth defect in the US. Those two small revelations made me think, what would happen with a rising population of children with vampire parents? Hence my idea of hybrids and hybrid society was born.

Monica Vespucci's baby with Robert was never mentioned in canon past the fact of her pregnancy. I used that as a basis for Bobby, Mara's friend and fellow hybrid.

Anita mentioned in canon that "safehouses" are maintained for lycanthropes, but in practice function more like prisons that are almost impossible for shifters to get out of. In my fanon, the ACLU won the court battles and got the safehouses shut down not long after, but the "safehouses" for military personnel infected with lycanthropy lasted much longer. (It is a sad fact that when they choose to join the armed forces, military personnel lose their own access to many of the rights civilians take for granted, even as they defend them for the rest of us.) The military safehouses were only shut down a little over a year before the events of "Friends With Fangs", over a decade after the last civilian safehouse was shut down.

There have been some changes in the intervening time for our favorite characters as well: