I've read and loved all of Frasier's works written as Theresa Weir and liked well enough the first two or three as Anne Frasier: Hush, Sleep Tight, Before I Wake. I liked Pale Immortal less and Garden of Darkness less than that, mainly because of the subject matter, but also partly because of the writing.
As Theresa Weir, Frasier turned out very well written edgy romance/mystery character studies, with humor, wit and intriguing storylines. Her male characters had depth and were believable; her female characters had hangups but were sympathetic; you cared what happened to them. I find that to be less true in her novels as Anne Frasier. I was interested enough in Evan Stroud from Pale Immortal to buy GofD, but had I known where Frasier was going (and apparently intends to go) with these characters, I probably would have given it a miss, since I have no interest in the vampire genre. In Garden of Darkness, I liked the teenage Graham and cared a bit about poor suffering Evan himself (though I think his future must remain a mystery to me), but was less interested in the other characters, including Rachel, and cared least of all about the dismal and depressingly dark town of Tuonela, Wis. Too, the quality of the writing is not as good in this book. Pale Immortal didn't have much life (no pun intended) and sometimes plodded along, but Garden of Darkness plods, occasionally feels disjointed and uneven, and suffers from awkward transitions. Also, the mysterious deaths in this novel are never explained. Perhaps we are supposed to assume we know the answer but I like a little Perry Mason closure with my mysteries, even in tales where the supernatural may be at work!
Garden of Darkness was not terrible, in my opinion, but not good enough to tempt me back to Tuonela and its spooky citizenry.