Doc Sidhe Harris Greene, a failing kick-boxer in this world, gets dragged to the "Fair World" while protecting his ex-girlfriend, Gabrielle ("Gaby") from a group of less than friendly elves trying to kidnap her. Seems some people slip from one world to the next, so there's a small group of residents of each world in the other – and these elves want to eliminate those groups on both worlds.

Harris, lost now in Neckerdam, the Elven equivalent of 30's New York, ends up connecting with the Elven equivalent of Doc Savage – Doc Sidhe. The rest of the book covers the attempt to thwart the evil-doers plans, while riding on running-boards, autogyros ("rotar-kites"), and enormous sea-planes. There's even an equivalent of Savage's Mayan tribe.

Stretching the boundaries of the term "Alternate History" in a sort of Thirty's pulp fiction – and Doc Savage in particular – way, is the book Doc Sidhe, by Aaron Allston.

Basically, imagine Doc Savage as an elf.

The Elven (or "Fair") world is much like ours (the "Grim World"). In fact, it's history is a slightly twisted copy of ours, but "running" about sixty years behind (they're in the middle of a depression, had a major war fifteen years previous, and so on).

It's a fun book, and a nice homage to the Doc Savage series without being so much of a copy as to be a parody, or to be unable to stand on it's own. It reminded me in some ways of some of Dan Goodman's stuff.

"Sidhe-Devil" by Aaron Allston

Zeb Watson is pleased to find himself at the wedding of his friend, Harris Greene, to his long time girlfriend, Gaby. It was the wedding he never thought he'd see happen, because of Harris's...issues.

But Harris now seems a changed man and Gaby a happy bride. Still, it was odd how Harris had changed so. And the both of them were strangely reluctant to explain just where and what they'd been doing the past few months together...

...then some fairies tried to kidnap the couple.

Soon, Zeb found himself in the "Fair World" and embroiled in a battle between Doc Sidhe and his men and a mysterious "God" who throws building-destroying fireballs. Tracking the clues, they fly to the Fair World's version of Germany - pre-war Nazi Germany - disguised as contestants in that world's version of the 1936 Olympics...

Now Zeb will have to battle on the game field and in the dark of night to stop conspiracy that's built its own God...

Well, if nothing else, the sequel is definitely in the running for "Worst Pun in a Book Title..."

It picks up six months after the events in the first book and then travels all over. What seems to be a "simple" case of a gang trying to shake Neckerdam down for money soon leads to major political intrigue at the "Olympic" Games. And, surprisingly, you're never quite sure who's on whose side until the very end.

And things finally come to a conclusion no where near where you'd expect.

Allston sorta once said there'd be a third book – and you can bet I would have bought buy it if it had ever come out – but unfortunately, he died in 2014 so...damn. Still, I suggest you read the these two and dream of what might have been...