Title: The Vistor
Pairings: Spike/Xander; Anita Blake/Jean-Claude
Author on LJ: riani1
Author Website: Two Ladies of Quality

Why this must be read:
This tale of an encounter between two vampire slayers is fun, with Whedonesque quips and smile-inducing characterization; Buffy fans will enjoy it. You don't need to know more about the Blake 'verse than the fact that the vampires have different "rules" regarding how they are created and killed.

I know there's only supposed to be one crossover rec but I just couldn't decide between two and I'm hoping the mods will forgive me and allow me this mishap. You can count this as one of my regular recs instead if you want but I couldn't decide between Lex and all these hot boys. I'm so sorry.
Title: Black Magic By Moonlight
Author: Beren
Author on LJ:beren_writes
Pairings: Harry/Nathaniel/Draco, Harry/Draco, Asher/Anita/Jean-Claude, Anita/Nathaniel, Anita/Micah
Author Website:Beren's Harry Potter Fanfic Site is password protected but no worries it's also all on the livejournal
Why this must be read:
Amazing, amazing story and the characters ar right on whether you're an Anita Blake fan or a Harry Potter fan this is the story for you and if you don't know that much about either world don't worry it's explained along the way, so click on the link and kick back for a long read with protective Anita, snarky Draco, clueless but powerful Harry and the rest of the gang because believe me you won't regret it. This story has everything, love, lust,revenge, magic,shapeshifters,conspiracy and hot sex.
Author's Summary:Harry Potter could find trouble in paradise and when Draco sends him to St Louis for a holiday it's not paradise and there's lots of trouble. With dark magic, vampires, lycanthropes and more, who else could sort it out but Anita Blake?

Black Magic by Moonlight Index

Title: The Key's Watcher by Tara Keezer
Pairing: None; Gen
Author on LJ: elementalv
Author Website: Elemental Vision

Why this must be read:
A lengthy, detailed AU from the end of season 5, "The Gift," Giles and Dawn find themselves in Laurell K. Hamilton's Anita Blake universe.

I like the father/daughter relationship that this Dawn and Giles develop once they are marooned in this new universe together. Dawn was never one of my favorite characters, although I liked her in season 7. However, Tara takes season 5 Dawn and shows me another side of the charcter, and I find her appealing.

There is plotty goodness along with the familial domesticity, and I happily read the series as a WIP. Fortunately for you new readers, it's complete, so you get it all at once.

Tara has done something interesting with the series: she has a slash storyline that complements the gen story, Dark Haven (NC-17), Giles-Jean-Claude, which begins after The Key's Watcher 3: Hunter's Moon. You don't have to read the slash--the gen story stands alone--but Dark Haven makes a good addition to the crossover universe Tara has created. Dark Haven 3 is a WIP, but Tara has been posting regularly.

The Key's Watcher index page