Edited on August 21, 2011 to add the cover image and some formatting.
Katherine Kurtz and Deborah Turner Harris
The blurb on the back of the book:
He is eternalThis is the second book in the series, which is comprised of: The Adept, The Adept: the Lodge of the Lynx, The Adept: The Templar Treasure (I'm now rereading this one), Dagger Magic and The Death of the Adept. Two other books, The Temple and the Stone and The Temple and the Crown are set in the middle ages in the last years of the Templar Knights that are linked to this series as well, although somewhat tentatively if I'm remembering right. Its been a while since I've read those two books. There are also two short stories set in the same world and time period in two of the Templar anthologies Katherine Kurtz has edited.
So are his foes...
Through countless lives and eras, the Adept has fought against the powers of Darkness. Now, as psychiatrist Adam Sinclair, he leads his loyal Huntsmen against supernatural evil in all its myriad forms.
But the Darkness is striking back - In the guise of an unholy cult long thought to be extinct. Endowed with the elemental energy of an ancient Druidic artifact, the Lodge of the Lynx stands ready to unleash destruction on Sinclair, his allies and, ultimately, all of Scotland.
The old battle begins anew - and this time the future may belong to The Lodge of the Lynx.
The Lodge of the Lynx follows up on The Adept, starting almost immediately after that book left off. Given the start of this book, I'd say it isn't more than a couple of weeks after the end of the previous book. The two books could almost be seen as one book in two parts. This was the first book from the series that I read originally, and I did find things a bit confusing at first then, as the character introductions all occurred in The Adept. Now though, having read the books several times in order, I consider them to be 'old friends'.
All of the loose ends from The Adept are wound up in this book: Gillian Talbot/Michael Scot being the main one, and a whole host of new characters are introduced. Some of them, such as the villains will turn up in later books in the series. In fact, some of the events in this book are setting the stage for the fifth book in the series, Death of an Adept.
To give you an idea of how much I've enjoyed this book, my copy is starting to look as though it came from a public library: a couple of the pages are torn, the spine is getting faded and the corners and edges are all battered.
As with Lammas Night, this is an older series, marked by Indigo Books as 'sold out', and your best bet for finding the books is a used book store.
I wish I knew of more books like these. The closest I can think of are Mercedes Lackey's Diana Tregarde books.